They chose him to speak for the group.他们选他代表全组发言。

Speaking only for myself, I'm against the plan. [=I'm only expressing my own opinion when I say that I'm against the plan]就我自己而言，我反对这个计划。

“We don't want any dessert.” “Speak for yourself. I want some.”“我们不想要任何甜点。”“那是你们的意见。我想要一些。”

I have nothing more to say. The facts speak for themselves. [=the facts clearly show what is true]我没有什么可说的了，事实不言而喻。

It speaks well for [=says a lot for] the company that it donates so much money to local charities.这家公司捐赠了大量钱款给当地慈善机构，说明这是家很不错的公司。

Her calm reaction to the crisis speaks well for her ability to perform under pressure.她在危机中冷静的反应表明她有良好的抗压能力。

The test results speak poorly for our school system.测试结果表明我们的学校体系欠佳。

I'm sorry. This seat is spoken for.对不起，这座位有人了。

I can't go out with you; I'm already spoken for.我不能和你出去，我已有约了。