\\\"caught by a couple of alert cops\\\"
\\\"alert enough to spot the opportunity when it came\\\"
\\\"constantly alert and vigilant, like a sentinel on duty\\\"
experiencing or accompanied by sleeplessness;
\\\"insomniac old people\\\"
\\\"insomniac nights\\\"
\\\"lay sleepless all night\\\"
\\\"twenty watchful, weary, tedious nights\\\"
造句
用作形容詞(adj.)
You must be watchful of your health. 你必須注意你的健康。
They were not very watchful of the traffic lights. 他們并不很注意紅綠燈。
We should be watchful of computer viruses. 我們應該警惕計算機病毒。
The guard should be watchful during the night. 警衛在黑夜里也應該警醒。