exceeding the speed limit 超速
to exceed one's authority 越权
The cost will not exceed $50. 费用不会超过50美元。
The results of the competition exceeded our expectations. 比赛的结果比我们预料的好。
Experiment n. 实验，试验
We can learn by experiment that oil and water will not mix. 我们可以从实验中看到油和水是不相溶合的。
Experiment vi. （常与on, with连用）做实验
We experimented by putting oil and water together, and we saw that they did not mix. 我们把油和水放在一起做实验，结果看到它们不相溶合。
They experimented with new reagents and succeeded. 他们用新试剂做了试验,获得了成功。
expert adj. （常与at, in连用）内行的
At a special swimming pool in Los Angeles, children become expert at holding their breath under water even before they can walk.在洛杉矶的特别游泳池里,孩子甚至在会走路之前就能熟练地在水下屏住呼吸。
Rex soon became an expert at opening the gate. 雷克斯很快就成了开门能手。
Kate's an expert in / at / on teaching small children. 凯特是个幼儿教育专家。
All the young men are expert drivers.所有这些年轻人都是驾驶能手。
Expert n. （常与at, in连用）专家
an expert in cookery 烹调方面的专家
a cookery expert 烹调专家
extract
vt.
拔出；拉出
to extract a toot 拔牙
提取；榨出；
n.
提炼物；精华
lemon extract
柠檬精
external adj. 外部的；外面的
the external walls of a house 一座房屋的外墙
External causes become operative through internal causes. 外因通过内因而起作用。
This medicine is for external use only, not for drinking. 此药只供外用,不可内服。
外国的；对外的
external trade 国外贸易
This local newspaper doesn't pay much attention to external affairs.这家地方报纸不太注重国外新闻。
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