watchful

英文解釋：

形容詞 watchful:

1. carefully observant or attentive; on the lookout for possible danger
   同義詞：argus-eyed, open-eyed, vigilant, wakeful
2. experiencing or accompanied by sleeplessness- Shakespeare
   同義詞：insomniac, sleepless

詞型變化：

相關對話：

1. A watchful nurse tending a critically ill patient.
   照顧一個重病號的謹慎的護士
2. Be sure to be watchful or alert.
   必須留神，千萬要提防。
3. We should be watchful of computer viruses.
   我們應該警惕計算機病毒。
4. The guard should be watchful during the night.
   警衛在黑夜裡也應該警醒。