动词短语
中文翻译：张开嘴巴
同义词：
['open mouth', 'speak out', 'let loose']
例句：
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1.The dog was so excited that it couldn't help but mouth-open when it saw the ball.
那只狗太兴奋了，看到球时忍不住张大了嘴。
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2.She mouth-opened in surprise at the unexpected news.
她对这意外的消息感到惊讶而张大了嘴。
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3.The children were mouth-opening with laughter as they played a game together.
孩子们在一起玩游戏时笑得合不拢嘴。