1.all together的意思跟together的意思类似，可以解释为“with each other’ or 'at the same time', and is similar to together”，即一起、一道、同时。即全部在同一地方或同一时间。例如：

Can you put your books all together in this box?

你能把你的书都放进这个箱子里吗？

We put our cards all together in one pile. 我们把卡片放成一堆。

Put your clothes all together in one pile and I’ll wash them for you.

把你的衣服放在一起，我会帮你洗好。

The last time we were all together was in 2020.

我们所有人上一次聚在一起还是2020年。

"Are you all together?" "Yes, Can you do a table for six?" “你们是一起的吗？” “是的，能帮我们安排一张6人桌吗？”

Let’s sing ‘Happy Birthday’. All together now!

咱们来唱“生日快乐”。现在一起唱！

The two iron balls fell to the ground all together.

这两个铁球同时落地。