The results showed that in the rolling process of closed-cell aluminum foam the basic principle is multiple pass with small deformation, eg.

结果表明：闭孔泡沫铝的轧制应遵循多道次、小变形的原则。

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But sometimes you can pass multiple things inside those parentheses, and so you separate them by commas.

有时候我们可以往圆括号里填入多个参数,参数与参数之间用逗号分开。

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FORBES: Magazine Article

Similarly, during the October 2002 Washington-area sniper investigation, the African-American man and boy ultimately accused of the crime reportedly were able to pass through multiple road blocks with the alleged murder weapon in their possession, in part, because police 'profilers' theorized the crime had been committed by a white male acting alone.

CNN: Why profiling doesn't work

The key is for them to play nice with each other, and the answer isn't a one-way interface like IR, or an HDMI pass-through with multiple user interfaces layered on top of each other.

ENGADGET: Editorial: What's wrong with TV, and what it might take to change it