This flashcard teaches the meaning, pronunciation, and usage of the word 'alertness', which is a noun meaning a state of vigilance or readiness.
这张闪卡教授了单词 'alertness' 的含义、发音和用法，它是一个名词，表示警戒或机敏的状态。
| 单词 | alertness |
|---|---|
| 发音 | [ə'lɜːtnəs] |
| 释义 | n. 警戒；机敏 |
| 词序 | 19054 |
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