16. nickname:

(1) (n.) name given instead of the real name昵称；绰号
He is always in a hurry, so they gave him a nickname "Sir Hurry".
他总是急匆匆的，我们给他送了个雅号"匆匆先生"。

(2) (vt.) 昵称；加绰号
We nicknamed him "Foureyes", because he wore glasses.
我们昵称他为"四眼"，因为他戴眼镜。

17. opposite

(1) (a.) front to front or back to back with对面的；对立的；相反的
On the opposite side of this road stands a famous restaurant.
在马路的对面有一著名餐馆。
You should take the bus in the opposite direction.
你应该到对面去乘车。

(2) (n.) word or thing that is opposite对立面；反面
Black and white are opposites.
You are cold-blooded, and she is just the opposite.
你是冷血动物，而她则正相反。

(3) (prep.) 在…对面
We live opposite the park.
She sat opposite me.

18. build:

(1) (n.)(of human body) general characteristics of shape and proportion 体形
We are of the same build.

(2) (vt.&vi.) 建造；构筑；发展；加强
This house is made of wood.
Birds build nests.
鸟儿筑巢。
Reading builds the mind.
阅读丰富大脑。
The plot builds towards the climax.
剧情向着高潮发展

19. notice

(1) (vt.&vi.) observe; take attention to 注意到；观察到
I noticed that he left early.
我注意到他早早离开了。
Did you notice her hand shaking?
你注意到她的手在颤抖吗？

(2) (n.) news about sth. about to happen 通知；布告；海报
Every year there will be a notice of births, deaths and marriages published in the government newspapers.
每一年，出生、死亡和结婚公告将在政府报纸上发表。
Put up a notice (海报) on the wall beside the gate of the school.

(3) (n.) attention 注意；觉察
This detail escaped (逃脱) my notice.
这个细节没引起我的察觉。
The theft went on silently, attracting no notice.
偷窃静静地进行着，没引起任何注意。