alertness的意思

alertness

英式音标[ə'lɝtnɪs]
美式英标[ə'lɜːtnəs]

基本解释

n. 警戒；机敏

英文词源

alertness (n.): 1714, from alert + -ness.

实用例句

1. The drug improved mental alertness.: 该药有助于提神。

2. 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.

3. 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.

4. The order urged the armed forces to enhance their alertness.: 该项命令敦促武装部队提高警惕.

5. Ginseng was reported to have increased energy and mental alertness.: 人参可以增进体力和提高精神敏捷性.

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