At the first hint of trouble, they left.

他们一发现有点不妙的迹象就离开了。

《牛津词典》

At the first gunshot, the crowd scattered.

枪声一响，人群便逃散了。

《牛津词典》

I passed my driving test at the first attempt.

我考汽车驾驶执照一次就通过了。

《牛津词典》

As histories tell it,he looked and looked at the first photograph, and said: "This is one for all time."

VOA: special.2010.05.31

And if that's true is everything in the string, starting at the first element and removing the last element, a palindrome?

如果是相同的话,是不是字符串中的所有从第一个元素开始,并且删除最后一个元素后？

麻省理工公开课 - 计算机科学及编程导论课程节选

Well it'll be interesting to see if you swing at the first pitch and decide to take this class on.

我很希望大家能,上了试听课后,继续选修这门课

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

At the first sign of a strengthening dollar, you should sell the bond, she says.

FORBES: The Global Test

Now, that cooperation was on display yesterday at the first G20 summit in an Asia Pacific nation.

WHITEHOUSE: President Addresses CEO Business Summit

"I'm aiming to drive the car at the first test, " Webber told BBC Sport.

BBC: Webber targets return in February