(1) (British English)a right-angled triangle
(2) (North Amercian English)a right triangle
(3) Cut the sandwiches into triangles.

(1) to undertake a task/project
(2) University professors both teach and undertake research .
(3) The company has announced that it will undertake a full investigation into the accident.

(1) Scarlett looked at her in surprise for india was always so self - contained.
(2) There , in the yellow lamplight were Ashley, Aunt Pitty and india.
(3) I'll do it with pleasure ,'said india and her eyes glittered.

(1) The details of today's flights are displayed on the monitor.
(2) a PC with a 17-inch colour monitor
(3) a heart monitor

(1) Air pollution in the city had reached four times the acceptable levels.
(2) The food was acceptable, but no more.
(3) Children must learn socially acceptable behaviour.

(1) A man was arrested by the police and held for questioning.
(2) Get out of the house or I'll call the police .
(3) police suspect a local gang.

(1) The farmer lassoed the cow.
(2) The farmer is shearing his sheep.
(3) The farmer milks the cows twice a day.

(1) A trailer was attached to the rear of the truck.
(2) There are toilets at both front and rear of the plane.
(3) A high gate blocks the only entrance to the rear .

(1) diplomatic/international/foreign relations
(2) US-Chinese relations
(3) relations with neighbouring countries are under strain at present.

(1) Her article is a discussion of the methods used in research.
(2) We had a discussion with them about the differences between Britain and the US.
(3) a topic/subject for discussion

(1) floor/office/shelf, etc. space
(2) We must make good use of the available space.
(3) That desk takes up too much space .

(1) a shampoo for greasy hair
(2) carpet shampoo
(3) Rinse the hair thoroughly after each shampoo.

(1) The school will only allow this in special circumstances.
(2) Some of the officials have special privileges.
(3) There is something special about this place.

(1) The owl is sacred for many Californian indian people.
(2) We hiked the Grand Canyon, exploring indian cliff dwellings.
(3) They battled against other indian tribes, but rarely fought with the whites.

(1) a rowing/sailing boat
(2) a fishing boat
(3) You can take a boat trip along the coast.

(1) the sophisticated pleasures of city life
(2) Mark is a smart and sophisticated young man.
(3) highly sophisticated computer systems

(1) They keep a list of people (who are) willing to work nights.
(2) I'm perfectly willing to discuss the problem.
(3) willing helpers/volunteers

(1) a purple flower
(2) His face was purple with rage.
(3) [不可数名词, 可数名词]She was dressed in purple.

(1) He's in the first fifteen.
(2) In India, there are fifteen official languages.
(3) Six from fifteen leaves nine.

(1) I'm cold. Turn the heating up.
(2) to feel/look cold
(3) cold hands and feet

(1) to raise/cut taxes
(2) tax increases/cuts
(3) changes in tax rates

(1) a precious vase
(2) The crown was set with precious jewels─diamonds, rubies and emeralds.
(3) Clean water is a precious commodity in that part of the world.

(1) ‘Couldn't you have just said no? ’ ‘Well, hardly, (= of course not) she's my wife's sister. ’
(2) You can hardly expect her to do it for free.
(3) It's hardly the time to discuss it now.

(1) The crowd had to stand behind barriers.
(2) Show your ticket at the barrier.
(3) the removal of trade barriers

(1) a baseball/cricket bat
(2) He bats very well.
(3) Who's batting first for the Orioles?

(1) absolute power/authority
(2) an absolute ruler/monarchy (= one with no limit to their power)
(3) Although prices are falling in absolute terms , energy is still expensive.

(1) Most people walk at an average rate of 5 kilometres an hour.
(2) The number of reported crimes is increasing at an alarming rate.
(3) Figures published today show another fall in the rate of inflation.

(1) a packet of biscuits/cigarettes/crisps
(2) A packet of photographs arrived with the mail.
(3) a packet of instant cocoa mix

(1) a representative of the UN
(2) our elected representatives in government
(3) a union representative

(1) That's the best movie I've ever seen!
(2) She was one of the best tennis players of her generation.
(3) Is that your best suit?

(1) The magician vanished in a puff of smoke.
(2) My glasses seem to have vanished.
(3) He vanished without trace .

(1) There's a bank right across the street.
(2) He hit him across the face.
(3) Where's the nearest bridge across the river?

(1) French air traffic controllers have begun a three-day strike in a dispute over pay...
(2) Staff at the hospital went on strike in protest at the incidents.
(3) ...their recognition of the workers' right to strike...

(1) our ultimate goal/aim/objective/target
(2) We will accept ultimate responsibility for whatever happens.
(3) The ultimate decision lies with the parents.

(1) He chopped some wood for the fire.
(2) a plank of wood
(3) All the furniture was made of wood .

(1) He's a wily old fox.
(2) The last question foxed even our panel of experts.
(3) Enrico was too good, an old fox, cunning.

(1) We were greatly encouraged by the positive response of the public.
(2) Banks actively encourage people to borrow money.
(3) They claim that some computer games encourage violent behaviour in young children.

(1) a highly influential book
(2) She is one of the most influential figures in local politics.
(3) The committee was influential in formulating government policy on employment.

(1) Each word was freighted with anger.
(2) passenger and freight transportation services
(3) to send goods by air freight

(1) the electronic edition of ‘The Guardian ’
(2) Tonight's edition of ‘Panorama ’ looks at unemployment.
(3) The dictionary is now in its sixth edition.