| 单词 | alertness |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔alertness〕The drug improved mental alertness.该药有助于提神。柯林斯高阶〔alertness〕The drug improved mental alertness.这种药可以提高大脑的注意力。外研社新世纪〔lethargy〕These nouns refer to a deficiency in mental and physical alertness and activity.这些名词都是指精神或者肉体警觉和活动效力的丧失。美国传统〔manifest〕A dog's protective instincts are manifested in increased alertness.狗的自我保护本能表现在它的警觉性越来越高。朗文当代〔sluggish〕Lacking alertness, vigor, or energy; inert or indolent.懒散的：缺少机灵、活力或能量的；呆滞的或懒惰的美国传统The order urged the armed forces to enhance their alertness. 该项命令敦促武装部队提高警惕。译典通 |
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