动词短语
中文翻译：面带微笑
同义词：
['smile', 'grin', 'beam']
例句：
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1.He was so happy that he couldn't help but smile in countenance.
他太高兴了，忍不住露出了笑容。
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2.The children were so excited that they couldn't help but beam in countenance.
孩子们太兴奋了，忍不住露出了喜悦的笑容。
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3. As the sun began to set, she couldn't help but smile in countenance.
随着太阳开始落山，她不由自主地露出了微笑。