I can't edit it. I was too slow!

我无法对其进行编辑，我太慢了！

You're moving too slow.

你走得太慢了。

You're too slow.

你跑得太慢了。

Firstly, it's expensive, and secondly, it's too slow.

首先是价格贵，其次，速度太慢。

You would have this initial response for chickenpox, and this initial response might be too slow to prevent you from getting chickenpox.

你会对水痘病毒产生这种初始应答，这种初始应答可能过于缓慢，无法预防水痘。