知道从见面到约会还需要一段时间。通常情况下是先逐渐了解对方的狗狗，然后才发现你们可能还有其他共同点。

Know that meeting to dating can take time. Often, it's about getting to know each other's dogs before realizing you might have other things in common.

youdao

复用的问题之一是在开发时两个组件需要知道对方的存在。

One of the problems with reuse is that two components need to know about each other's existence at development time.

youdao

为了使对方得到答案，他们竟发明了一套完整的密码系统：坐在右边的一位，需要知道第五题的答案时，他就用铅笔在桌子上轻轻敲五下，坐在左边的一位回敲两次——表示答案是B。

One kid would tap his pencil lightly five times indicating he needed the answer to number 5.

youdao

We need not just that you're all rational players, not just that you know each other's rational, but you know everyone else's rational.

不仅需要你们都是理性的参与人,不仅需要你们知道对方是理性的,而且必须知道所有人都是理性的

耶鲁公开课 - 博弈论课程节选