Because he kept breaking into a slow grin now and then, Mary was not afraid to talk to him.

他时不时会笑一笑，玛丽并不害怕和他说话。

youdao

My car broke down and then I locked myself out—it's just not my day!

我的汽车抛锚了，我又没带房门钥匙—真是祸不单行！

《牛津词典》

And then there those who, not knowing what questions are coming at them, and having no resources to refer to, can freeze.

然后，那些不知道会遇到何种题目，也没有资源可以参考的人，可能会整个人呆在那里。

youdao

Then he was sold to a man who took him to Illinois and Wisconsin, where slavery was not legal.

VOA: special.2009.05.21

And then, of course, not just whether the reaction will occur but, how fast it occurs is really important.

当然，我们不光要研究一个反应会不会发生,反应速率多块也是很重要的研究问题。

麻省理工公开课 - 化学原理课程节选

So when someone says, "your apartment, it's not so great." You can tell them these reasons and then you say,

所以当有人说，“你的公寓不怎么样”，你可以告诉他们上述理由，然后你说，

That's why 课堂 - SpeakingMax英语口语达人

By looking at what the software does in its intended environment (usually Windows) FireEye can determine if it is malicious or not and then allow it through or block it.

FORBES: Modern malware requires modern methodologies to block

This means that there were buyers betting with borrowed money that the price of oil would climb and not fall and then got caught short when the margin increased.

FORBES: Obama Released the SPR, and All He Got Was...Nothing

However, what really needs to happen is that each year Congress must carefully determine what is working and what is not working and then make changes.

FORBES: CBO Claims Health Care Act Now Saves Taxpayers $84 Billion