1.perpetual：continuing for a long period of time without interruption不间断的；持续的；长久的
Eg:We lived for years in a perpetual state of fear.多年来我们一直生活在恐惧中。
2.empirical:based on real experience or scientific experiments rather than on theory
Eg:an empirical treatment of a disease about which little is known
3.sent out:to send a lot of copies of the same document to a large number of people
Eg:we send out 300 invitations to our gallery opening. gallery opening.
4.pick holes in: if you pick holes in an arguement or theory,you find weak points in it so that it is no longer valid
Eg:He then goes on to pick holes in the article before reaching his conclusin.
5.bounce back :to become healthy, happy, or successful again after something bad has happened to you
Eg:He’s sad about Sally leaving him, but he’ll bounce back.
6.foil:metal made into very thin sheets that is used for covering or wrapping things, especially food（尤指包装食物等用的）箔
7.crash down:an occasion when a computer or a computer program suddenly stops working
Eg:The system is prone to crashes
8.vacuum pump:a pump that moves air in or out of something
Eg:Forget the buckets - most farms these days have their trees hooked up to miles of tubing and vacuum pump the sap into tanks.
9.eclipse:to make the sun or moon become partly or completely dark because of the position of the sun, moon, and earth in relation to each other
10.ingenious:an ingenious plan, idea, or object works well and is the result of clever thinking and new ideas〔计划、主意或物体〕精巧的，巧妙的:
•Many fish have ingenious ways of protecting their eggs from predators.很多鱼都有绝妙的方法来保护它们产的卵不被捕食动物吃掉。
11.astrolabe:a device used in the past for measuring the distances of stars, planets etc. and
for calculating
12.distillation:the process of purifying a liquid by boiling it and condensing its vapors
Eg:Instead we have just thedistillationof roleplaying—playing a role
13.ground-breaking:being or producing something like nothing done or experienced or
created before
14.dissection:cutting so as to separate into pieces
15.overturn:to say officially that something such as a decision or law is wrong and change it
Eg:The appeal court refused to overturn the lower court’s decision
16.quash:to say officially that a decision taken by another court was wrong and no longer has legal force
Eg:His conviction for murder was quashed in the Court of Appeal.
17.superb:of the highest quality
Eg:The Hotel Gardesana offers superb views of the lake
18.fold-out:a fold-out table, bed, or page is kept folded in a smaller shape when you are not using it
19.discredit:to make people think that something is not true
Eg:attempts to discredit evidence
20.leap-frog:to get to a higher position or rank by going past sb else or by missing out some stages越级提升
◆The win allowed them to leapfrog three teams to gain second place.这场胜利使他们连超三个队，跃居第二位。
21.harbour:to contain sth and allow it to develop包含；藏有
◆Your dishcloth can harbour many
germs.洗碗布中可能藏有很多病菌
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