watchful
US /ˈwɑːtʃ.fəl/
UK /ˈwɒtʃ.fəl/
形容詞
警惕的, 留心的
watching someone or something closely; alert and vigilant
範例:
•
The mother kept a watchful eye on her children at the park.
母親在公園裡警惕地注視著她的孩子們。
•
Security guards must remain watchful at all times.
保安人員必須時刻保持警惕。