1.principal adj. 主要的

My principal concern is my family's welfare.
我至为关心的是我一家的幸福.

2.unreserved adj. 没有被预订的

An unreserved grin of approval.
毫不拘谨地咧嘴大笑以示同意

3.decline [di'klain] n. 衰微, 跌落; 晚年 v. 降低, 婉谢

Decline with thanks
婉言谢绝

4.resentment n. 怨恨, 愤恨

He has a deep-seated resentment at the way he has been treated.
他因受到如此对待而深怀怨恨。

5.scarcity n. 缺乏, 不足, 缺少

The scarcity of food forced prices up.
食物短缺促使物价上涨。

6.overhear v. 无意中听到, 偷听

I overheard them saying they were unhappy.
我偶然听到他们说, 他们很不快乐。

7.insupportable adj. 忍耐不住的, 不能忍受的

I can't hold with him, he's insupportable.
我不能容忍他, 他简直使人受不了。

8.engaged adj. 忙碌的, 使用中的, 订婚了的

His line is engaged.
他的线路在接听中。

9.fastidious adj. 难取悦的, 挑剔的, 苛求的

She is so fastidious about her food that I never invite her for dinner.
她对食物过於挑剔, 因此我从不请她吃饭

10.behold v. 看, 注视 vt. 看到

They beheld the great wall.
他们看到了雄伟的长城。

11.disposition n. 性情

The child had a placid disposition.
这个孩子性情温和。