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Her expression was watchful and alert.
她露出一副察言观色、处处提防的表情。
《牛津词典》
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The watchful mind, being alert, sensitive, knows when the organism needs rest and care.
警觉的心灵，保持机警，敏感，知道这个有机体需要休息和照顾。
youdao
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The watchful mind, being alert, sensitive, knows when the organism needs rest and care.
警觉的心灵，保持机警，敏感，知道这个有机体需要休息和照顾。
youdao