Shaking hands is another traditional way of greeting someone in America.

在美国，握手是另一种传统的问候方式。

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If our right hand is busy greeting someone, it can't be holding a weapon.

如果我们的右手忙着与人打招呼，那么就不会用来握武器了。

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If our right hand is busy greeting someone, it cannot be holding a weapon.

如果我们的右手忙着和别人打招呼，就不可能握有武器了。

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Then when a stranger approaches or someone else approaches there they'll tend to give more of a greeting smile.

当陌生人或其他人接近时,他们是问候式微笑。

耶鲁公开课 - 心理学导论课程节选

Are handshakes or bows acceptable when greeting someone?

FORBES: Your Basic Guide To Business Travel Abroad

He theorises about the common objection to shopping malls at airports, and the universal hopes of a greeting from "someone significant" at arrivals.

ECONOMIST: Business travel