严肃的神情
A serious expression
以上为机器翻译结果，长、整句建议使用 人工翻译 。
当他出发去前线的时候，他们用严肃的神情望着他。
When he left to go up the line, they looked at him with a solemn expression.
youdao
哈里·伦敦收起了严肃的神情，笑了起来。
Harry London pushed aside his seriousness and grinned.
他脸上露出严肃的神情。
His face was grave.
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