whether
是否，不论
Tell me whether he'll come.
告诉我他是否会来。
Wherther it rains or shines, he goes jogging every morning.
不论晴雨，他每天早上都去慢跑。
nation
国家
The purpose of the United Nations is to maintain international peace.
联合国的宗旨在维系国际和平。
add
增加，添加
If you add two and three, you get five.
2加3等于5。
Add some wood to the fire to keep the room warm.
加些木柴进火堆里，让房间保持温暖。
The fancy dress added to Wendy's charm.
这件漂亮的洋装增添了温蒂的妩媚。
position
位置；地位；立场；职务；姿势
Our hotel is in a superb position overlooking the sea.
本饭店地处绝佳位置，可俯瞰海景。
My cousin holds a high position in the government.
我表哥在政府中位居要职。
What would you do if you were in my position?
假如你处在我的情况下会怎么做？
This position pays a lot of money, but the work is hard.
这个职务待遇不错，不过工作挺辛苦。
We remained in the same position for 20 minutes.
我们维持同一姿势达20分钟之久。
receive
收到；接待
Did you receive the letter I sent you?
我寄给你的信，你收到了吗？
I was warmly received by my roommates.
我受到室友们热情地接待。
office
办公室；公职
There is no one in the office now.
现在办公室没人。
Mr.Smith took office as mayor of this city yesterday.
史密斯先生昨天就职为本市市长。
officer
军官；警官；官员
John's father is a police officer.
约翰的父亲是个警官。
yet
尚未；然而＝but
He hasn't shown up yet.
他还未现身。
Peter is a little lazy, yet I still like him.
彼得有一点懒，然而我还是喜欢他。
almost
几乎，差点
You are almost thirty, yet you are still so childish.
你已经快要30岁了，但还是这么幼稚。
happen
发生；正巧
The accident happened at midnight last night.
这起意外事故发生在昨晚午夜时分。
What happened to your left eye?= What's the matter with your left eye?
你的左眼发生了什么事？
I happen to have $100 with me.
我正巧身上有100元。