| 单词 | 突然警觉起来 |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔alert〕The animal raised its head, suddenly alert.那只动物抬起头，突然警觉起来。朗文当代〔alert〕There was a noise outside and he was suddenly alert.外面有声响，他突然警觉起来。牛津搭配 |
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