保持第一个Alt按下，然后再按tab键。

Keep holding down that first Alt key, and then press Tab.

youdao

同时，我在简介中加入一句：对于本书，请保持第一人称阅读。

Meanwhile I added in the Introduction: Please maintain your first person view when reading.

youdao

然而，当早期的人类第一次开始反思周围事物的本质，他们发现只是为了让思维保持有序也需要有数字的概念。

However, when early humans first began to reflect on the nature of things around them, they discovered that they needed an idea of number simply to keep their thoughts in order.

youdao

The two things that you focus on are maintaining what you have now that's good and growing, all right?

你需要注意两件事,第一是保持现状，第二是不断发展？

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