【词汇讲解】

1.bacteria n. (复数)细菌

如：It is possible to multiply bacteria and other living organisms in the laboratory.
在实验室能够繁殖细菌和其他生物。

Many diseases are caused by bacteria.
许多疾病是由细菌引起的。

2.transient adj. 短暂的

如：Her feeling of depression was transient.
她抑郁的心情一会儿就过去了。

Life is transient.
人生很短暂。

3.scrub v. 用力擦洗

如：Although she scrubbed the old pot thoroughly, she could not make it look completely clean.
虽然她彻底地用力擦洗那只旧壶，但她还是，无法把它完全洗干净。

4.unsightly adj. 难看的，丑的

如：Failing to do so would cause unsightly burn marks.
如果不这样做，便会产生，难看的烤糊痕迹!。

The marking on the wall was childish and unsightly.
墙上的记号幼稚而且难看。

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