| 单词 | 他一会儿高兴 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔forth〕He went back and forth from being pleased to envious.他一会儿高兴, 一会儿嫉妒。外研社新世纪〔oscillate〕He oscillated between happiness and despair.他一会儿高兴，一会儿绝望。麦克米伦高阶 |
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