alertness

英 /ə'lɜ:tnəs/ 美 /ə'lɜtnəs/

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中文释义

n.警戒，机敏，戒心

alertness的英语例句

Alertness, calmness, courage : he could see them all in the youngster's face.

机警, 镇定, 胆量,都摆出在这年青人的脸上.
The drug improved mental alertness.

该药有助于提神。
We must maintain a military standard, an alertness, and never vary it.

我们必须保持军队的准则, 应当随时注意,切勿随时变动.