661. lest conj. 唯恐，免得

The parents were afraid lest he should fail in the final examination.

父母担心他期末考试不及格。

662. liable a. 可能的，大概的； (to) 易于...

A person is not liable for debt contract during his minority.

一个人不能对他在未成年期合同债务承担责任。

663. liberal a. 自由的

During that time, it rose in US News & World Report’s ranking of the best liberal arts colleges, from 25 to 17. （2009年12月大学英语四级考试试题）

664. liberty n. 自由

Who loses liberty loses all.

失掉自由使失掉一切。

665. license/license n. 许可证，执照

He applied for a trading license.

他申请了一张营业执照。

666. moisture n. 潮湿

Rainfall affects the moisture content of the atmosphere.

下雨对大气中的含水量有影响。

667. motivate vt. 激励，激发

He was motivated by love,and expected nothing in return.

他是出自爱心，并不指望得到任何回报。

668. motive n. 动机，目的

People with poor motives will always exist.” He says. “Sometimes environments constrain those people and sometimes environments give those people opportunity.” （2006年12月24日大学英语四级(CET-4)真题试卷(A卷)）

669. generate vt. 生成，产生（光、热、电等）

And this is not to minimize the tragedy and pain such a loss can generate. （2006年12月24日大学英语四级(CET-4)真题试卷(A卷)）

670. genius n. 天才，天赋

Her latest book is a work of genius.

她最近的书是一部天才作品。

671. genuine a. 真的，真诚的

His suitcase was made of genuine leather.

他的衣箱是用真皮制造的。

672. gasoline n. 汽油

It feeds on gasoline and air.

它助长了汽油和空气。

673. germ n. 微生物，细菌

Some disease are caused by germ-carrying insects.

一些疾病是由携带细菌的昆虫造成的。

674. gesture n. 姿势，手势

Handshake is a gesture of friendship.

握手是一种友好的表示。