* quiet
a. 轻声的; 安静的
We'll have to be quiet so as not to wake the baby.
我们得安静点，免得吵醒孩子。
* acquit
v. 宣判...无罪
All the defendants were acquitted.
所有被告都被宣判无罪.
* acquiesce
v. 默许; 顺从
Oil companies have been accused of acquiescing in the pollution of the ocean.
石油公司被指控对海洋污染的问题袖手旁观。
* disquiet
n. 不安；忧虑；烦恼
There is considerable public disquiet about the safety of the new trains.
公众对新型列车的安全深感忧虑。

* disquieting
a. 令人不安的，使人忧虑的
He found Jean's manner disquieting.
他觉得琼的举止让人忧虑。
* tranquil
adj. 平静的; 安静的; 安宁的
lead a tranquil life in the country
在乡间过着宁静的生活
* tranquillity
n. 平静：安静的性质或状态；宁静