英语四级单词每天背 第0291期

fluctuation

英 [ˌflʌktʃuˈeɪʃn] 美 [ˌflʌktʃuˈeɪʃn]

n. 波动，起伏

例句：

The erratic fluctuation of market prices is in consequence of unstable economy.
经济波动致使市场物价忽起忽落。

Changes in climate before that period caused severe fluctuation in sea level, resulting in the extinction of the dinosaurs.
在此之前，气候的变化导致了海平面的剧烈波动，恐龙因此灭绝。

Changes in climate before the Cretaceous period caused severe fluctuation in sea level, resulting in the extinction of the dinosaurs.
白垩纪以前的气候变化导致了海平面的剧烈波动，引发了恐龙的灭绝。

patriotism

英 [ˈpætriətɪzəm] 美 [ˈpeɪtriətɪzəm]

n. 爱国主义，爱国精神

例句：

His friends have a newfound sense of patriotism.
他的朋友们有一种新萌生的爱国主义意识。

Patriotism is every politician's stock-in-trade.
爱国主义是每个政客的惯用伎俩。

He was a country boy who had joined the army out of a sense of patriotism and adventure.
他是个乡下小伙子，出于爱国心和冒险精神参了军。

convict

英 [kənˈvɪkt; ˈkɒnvɪkt] 美 [kənˈvɪkt; ˈkɑnvɪkt]

v. 定罪，宣判……有罪

n. 已决犯，服刑囚犯

例句：

Who said that all the men in the world should wear dull gray suits and convict haircuts?
谁说世界上所有的男人都应该穿单调的灰色西装，留着罪犯式的发型？

The escaped convict was seized outside the city.
逃犯在城外被抓获。

The convict was pardoned after serving five years of his sentence.
罪犯服刑5年才获赦免。

watertight

英 [ˈwɔːtətaɪt] 美 [ˈwɔːtərtaɪt]

adj. （容器或房间）防漏水的，水密的；（理论、计划或协议）严密的，无懈可击的

例句：

The rules state that samples must be enclosed in two watertight containers.
条例规定样品必须用两个不漏水的容器封装起来。

If she could just establish the time the picture had been taken, Mick would have a watertight alibi.
只要她能确定拍这张照片的时间，米克就可以有一个无懈可击的不在现场的证据。

Only teak matches oak's expansion coefficient and stays watertight.
只有柚木才能达到橡木的膨胀系数，并保持水密性。

significance

英 [sɪɡˈnɪfɪkəns] 美 [sɪɡˈnɪfɪkəns]

n. 重要性，意义；意思，含义

例句：

They discussed the statistical significance of the results.
他们讨论了这些结果在统计学上的意义。

The president's visit is loaded with symbolic significance.
总统的访问富有象征意义。

Western diplomats have played down the significance of the reports.
西方的外交官们已贬低了这些报告的重要性。

回顾

1. fluctuation
2. patriotism
3. convict
4. watertight
5. significance