演讲时，使用友善及交谈式的声调。

Speak in a friendly, conversational tone.

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垂直方向的原型是交谈式的：界面的一个区域被执行到一定的深度。

A vertical prototype is the converse: one area of the interface is implemented deeply.

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当交谈不那么顺畅时，可以问一些开放式的问题，比如“你是怎么进入这一行的？”

When conversation lags, ask open-ended questions such as "How did you get into your line of work?"

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