| 词汇 | biological clock |
| 释义 | biological clockBrE /ˌbaɪəˌlɒdʒɪkl ˈklɒk/ NAmE /ˌbaɪəˌlɑːdʒɪkl ˈklɑːk/ noun (specialist ) a natural system in living things that controls regular physical activities such as sleeping 生物钟；生理钟◆ (figurative ) At 35 , Kate's biological clock was ticking (= she was beginning to think that she would soon be too old to have children ). 到 35 岁时，凯特的生物钟开始滴答作响（开始觉得很快就会年龄大得不宜生育了）。 |
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