He was going to ask her but he got cold feet and said nothing.

他本来是想向她提出邀请的，可事到临头他却胆怯得什么也没有说。

《牛津词典》

About a week before we were due to graduate I found myself alone on this floor. I always got cold and anxious there.

我们毕业前一周的一天，我独自呆在这层楼里，在那我总感到寒冷焦虑。

youdao

But NRG's management rebuffed the all-stock deal, and its shareholders, at first enthusiastic, got cold feet as NRG's rising share price made the terms less generous.

然而NRG的管理层冷漠拒绝了此项全股份交易，股东们最初很热情，但当NRG股价上涨使收购条件显得不再慷慨时，他们便临阵退缩了。

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A person might say that everybody but him got a pay raise, that he was left out in the cold.

VOA: special.2009.12.13

When something hot, it's got a higher temperature than when something is cold.

当某样东西是热的时，它的温度,比冷的东西要高。

麻省理工公开课 - 热力学与动力学课程节选

Cold call somebody who hasn't got their hand up.

你去找一个没有举手的人回答

耶鲁公开课 - 博弈论课程节选

Atari got cold feet, and dropped the idea -- and the game -- before completion.

ENGADGET: blogger-avatar

Immediately after, every distributor they had with any business sense got cold feet.

FORBES: Why Do North Koreans Invade The U.S. In 'Red Dawn' Remake? For The Money, Of Course.

After taking a look at PAL's books and labor problems, however, the two airlines got cold feet and withdrew their bids.

CNN: THE TROUBLESHOOTERS