alertness
警觉
常用释义
英音[ əˈlɜːtnəs ]
美音[ əˈlɜːrtnəs ]
基本释义
- n. 警戒；机敏
考试频率
六级
考频：近六年出现1次
- n.警戒; 机敏
例句
-
1·Alcohol causes a loss of judgment and alertness.酒精会使人丧失判断力和警觉性。
-
2·The drug improved mental alertness.这种药物提高了大脑的灵敏度。来源: 《柯林斯英汉双解大词典》
-
3·A short nap can promote alertness and improve performance, which are important when you are at work.小睡一会儿可以提高机警性，提高工作表现，这在你工作时是很重要的。
-
4·Decades of studies of bird flocks led researchers to predict extra alertness in the more vulnerable, end of the row sleepers.通过对鸟群几十年的研究，研究人员预测，那些更容易受伤的、睡眠时处于队列末端的鸟会格外警觉。
-
5·Another flaw of the tiredness theory is that yawning does not raise alertness or physiological activity, as the theory would predict.疲劳理论的另一个缺陷是，打哈欠并不能像该理论所预测的那样，提高警觉性或生理活跃度。
-
6·That purpose is alertness.这个目的就是警惕。
-
7·They also increase alertness and energy.它们也能提高机敏性和精力。
-
8·It made some evolutionary sense, that state of alertness.那种警觉的状态会形成某种进化感。
-
9·Research has shown that the lavender scent increases alertness.研究表明薰衣草香味会提高人的警惕性。
-
10·Do not assume that more sleep equals more energy and alertness.但不要以为多睡就意味着精力充沛。
同根词
词根：
alert