Smiling is not always important in every situation. Sometimes, people just smile to be polite, not because they are really happy. In formal situations, like business meetings, people might not smile much and keep a serious face. Also, some people, especially with strangers, prefer not to smile and just stay serious.
微笑並不總是在每種情況下都重要。有時,人們微笑只是為了禮貌,並不是因為他們真的很快樂。在正式場合,如商務會議,人們可能不會經常微笑,而是保持嚴肅的表情。另外,有些人,尤其是面對陌生人時,更喜歡保持嚴肅而不微笑。