不必严肃
Don't be serious
以上为机器翻译结果，长、整句建议使用 人工翻译 。
谈好恋爱的秘诀在于，不必严肃，但必须正经！
The secret to a good love is not to be serious but to be serious!
youdao
如果你没有对应征者持严肃态度，那就不必麻烦了。
If you aren't serious about the candidate, don't bother.
谈论死者不必过于严肃。
Talk about the deceased without being overly serious.
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