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