她和他在一起的时候感到很安全。

She felt secure and protected when she was with him.

《柯林斯英汉双解大词典》

我在他们睡觉或和保姆在一起的时候才抽烟。

I smoked when they were sleeping or when they were with the babysitter.

youdao

“你看，我们在一起的时候几乎总是忍不住笑。”科林解释说。

"You see we can't help laughing nearly all the time when we are together," explained Colin.

youdao

I don't know what that dream we're going to dream together is when we read that novel. I don't know what that'll be.

我不知道当我们一起读那部小说的时候,我们将会一起做个什么样的梦，我不知道。

耶鲁公开课 - 1945年后的美国小说课程节选

So when your friend ask you to go out that night even though it's something that you usually like to do,

所以当朋友们想叫你晚上一起出门玩的时候，尽管这是你平常挺爱干的事，

I feel like 课堂 - SpeakingMax英语口语达人

So, remember when we talk about Coulomb force, what's holding the nucleus and the electron together, there's 2 things we need to think about.

还记得我们在讨论库仑力的时候，提到是什么将原子核与电子束缚在一起时，有两点需要考虑。

麻省理工公开课 - 化学原理课程节选