To express any hope at this time they felt to be childish and stupid.

VOA: special.2010.03.06

You just need to express in ASCII character, one at a time, and these brave souls are simply going to spell something out for us to hammer home this point of binary.

你们只需要每人代表一个ASCII码，这些勇敢的小伙子们就是想,清楚的让大家理解二进制原理。

哈佛公开课 - 计算机科学课程节选

whenever you want to express what you are doing at a particular moment in time.

当你想表达在某一时刻你在做的事情时，你都可以用这个句型。

I'm ~ing 课堂 - SpeakingMax英语口语达人

Certainly there are concerns that people express from time to time - has the industry really learned the lessons?

BBC: Remembering Piper Alpha disaster

Bank analyst Dick Bove speculates that it could be receiving a commission from American Express every time cash is loaded on to the card or that it might be sharing in the return on the float.

FORBES: Walmart Targets Unhappy Bank Customers With New Prepaid Card--Should Big Banks Be Nervous?

Libyans do express dissatisfaction from time to time, especially in the east of the country, around Benghazi, where the police presence is strong.

ECONOMIST: Libya