821, underestimate vt.低估,看轻
vt. 对 估计不足, 低估
I underestimate the distance, and am exhausted.
没想到这么远, 我可累坏了。
n. 估计不足, 低估
822, underlying a. 在下面的,含蓄的,潜在的根本的, 基础的
The underlying theme of the novel is very serious.
小说隐含的主题是十分严肃的。
823, undermine vt. 渐渐破坏,暗中破坏,侵蚀基础
Badgers had undermined the foundations of the church.
獾在这座教堂的地基处打了洞。
暗中破坏; 逐渐削弱
Illness undermined his strength.
疾病逐渐削弱了他的力气
824, unemployment n.失业;失业人数
The riots took place against a background of widespread unemployment.暴乱是在普遍失业的情况下发生的。
失业, 失业率
Unemployment among married women reached a peak.
在已婚女性中失业率达到了峰值。
825, unfold vt.展开 vi.呈现
vi. 显露, 展现
As I opened the scroll, a panorama of the Yellow River unfolded. 我打开卷轴时, 黄河的景象展现在眼前。
vt. vi. 展开, 打开
Buds unfold in the sunshine. 花蕾在阳光下开放。
826, unify vt. 统一,使成一体
The emperor unified the country by the sword.
那位皇帝用武力统一了全国。
使相同; 使一致
The teacher unified the answer of her pupil with hers.
老师核对了学生的答案。
827, update vt. 更新,使现代化
They decided to update the computer systems.
他们决定更新计算机设备。
向 提供最新信息
The TV updated a news story on the bad storm coming to our area.
电视就我们地区即将来临的暴风雨作了最新报道。
n. 提供最新信息; 现代化; 更新
Maps need regular updates. 地图需要经常修订。
828, upgrade vt. 使升级,提升
n. 向上的斜坡
Freight trains travel slowly on upgrades into the hills.
火车徐徐向山上驶去。
vt. 提升, 使升级
They upgraded the land by improving it with new buildings. 他们建造新楼房来提高土地的等级。
829, uphold vt.举起;支撑;赞成
vt. 支持, 维护
They upheld our opinions. 他们支持我们的意见。
维持, 保持
The Supreme Court is expected to uphold the death sentence. 预计最高法院将维持死刑的原判。
830, validity n.有效,效力;正确
The tests have been shown to be of dubious validity.
这些试验的有效性已显得令人怀疑。
正当; 正确; 确实
I would question the validity of that assumption.
我会质疑那个假设的正当性。
2019年6月英语四级作文预测:电脑
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世界各地河流均被抗生素污染 非洲和亚洲最严重
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2019年6月大学英语四级作文范文:出国留学的挑战
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懒得撸铁?神奇T恤让你秒变肌肉男
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智商可预测,未来试管婴儿将可选择“最聪明的”胚胎
国内英语资讯:Xi meets representatives of overseas Chinese
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国际英语资讯:UN monitoring team verifies Yemens Houthi withdrawal from Hodeidah ports
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