The doctor probed the wound for signs of infection.

医生检查伤口是否有感染的迹象。

《牛津词典》

They did blood tests on him for signs of vitamin deficiency.

他们给他做了血检看是否有缺乏维生素的迹象。

《柯林斯英汉双解大词典》

Scientists are studying photographs of the planet for signs of life.

科学家仔细察看行星照片，寻找生命迹象。

《牛津词典》

They studied the pictures for signs of AMD and to see whether smoking influenced the womens chances of developing the disease.

VOA: special.2010.03.09

It turns out not, but it does evince the fact that we have some basic syntax like mathematics and equal signs and whatnot with which we can now start using for more useful purposes.

结果不是那样的，但这的确有个事实,我们有些基本的运算法则和等号和,其他一些东西，用来为我们一些,更多有用的目的而服务的。

哈佛公开课 - 计算机科学课程节选

I am going to ask you to give me each day-- or rather I'm going to give you, whoever signs the deal with me, 1000 dollars every single day for the next 30 days.

我要求你们每天给我…,还是我给你们吧，我给每个和我作交易的人，每天一千美元，连给30天。

哈佛公开课 - 幸福课课程节选

All across our base, soldiers sat in their rooms, listening for signs of escalation.

NPR: Spring a Season of Dread for Troops in Afghanistan

Many are watching for signs that the economic recovery is picking up the pace.

FORBES: Private Jobs Added: ADP Report Lower Than Expected

As part of the review, staffers look for signs that groups are participating in political activity.

NPR: AP Exclusive: IRS Knew Tea Party Targeted In 2011