| 词汇 | watchful |
| 释义 | adjective Her expression was watchful and alert. 她露出一副察言观色、处处提防的表情。 His mother kept a watchful eye on him. 他的母亲特别留心他。 The children played under the watchful eye of their teacher. 孩子们在老师的看护下玩耍。 She seemed watchful and slightly worried. |
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