音标:[ә'lә:tnis] ;
n. 警戒, 机敏
n. a state of readiness to respond
n. lively attentiveness
词型变化:名词复数形式 : alertnesses
词性分布:
名词100%

alertness的用法和样例:

例句

用作名词(n.)
  1. The other half of the brain stays awake at a low level of alertness.另一半大脑在低水平警戒状态下保持清醒。
  2. They also increase alertness and energy.它们也能提高机敏性和精力。
  3. Without Alertness I'll be stupid.没有机敏那是愚蠢。

词汇搭配

  • alert警觉的
  • over alertness过度警觉
【近义词】

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