我们的经理是个随和的人,她从不发怒。

PLA (=People's Liberation Army) 中国人民解放军

tyre n. rubber ring, full of air, that fits round the wheel of a motorcar, bicycle, etc.轮胎

I have a flat tyre----it needs some air in it. 我的车胎瘪了--需要打气。

overweight adj. too heavy 超重的

He eats too much and is quite overweight. 他吃得太多，因此身体太重。

teens n. the ages from 13 to 19 十三岁到十九岁的年龄;青少年

boys in their teens 少男;十三到十九岁的男孩

put an end to v. stop sth. happening 结束;终止

Let's put an end to smoking. 让我们停止吸烟吧!

operation n.[c] the act of a surgeon who cuts the body of a patient(外科)手术

He has to have an operation to undergo at once. 他不得不马上动手术。

n.[u] working, the way something works 工作;运转

The machine came into operation. 机器开始运转了。

knock down strike to the ground with a blow, etc; shoot down 击倒;撞倒

I was almost knocked down by a motorcar. 我差点被一辆汽车撞倒。

level n. surface parallel with horizon; such a surface with reference to its height 平面;水平面

The river level rose after the rain. 雨后河里的水面升高了。

n. how high something is 高度;级别;水平

We are working hard to catch up with the advanced world levels.

我们正在努力工作，以赶上世界先进水平。

junior adj. the younger; of lower rank or position年少的;等级较低的

He is three years junior to me. 他比我小三岁。

After graduation from a junior middle school, he entered a senior middle school.