第一，情景对话

A: John is very busy recently.

约翰最近看起来很忙。

B: He has many irons in the fire.

他手上揽了几份工作。

A: But he can manage to keep all of them hot.

但他还可以兼顾得很好。

B: He's really energetic.

他真是精力充沛。

第二，词海拾贝

have many irons in the fire

exp. To have several simultaneous activities or potential undertakings or opportunities. （同时有个事情要做）

e.g. I have many irons in the fire at work right now and it's going to be tricky to balance all of them over the next few weeks.

我现在在工作上有很多事情要做，在接下来的几周内平衡这些事情是很棘手的。

A: How's the job search going?

工作找得如何呢？

B: No interviews yet, but I have many irons in the fire.

还没有面试，但我有很多事情要忙。

I have no time to rest because I have many irons in the fire.

我没时间休息，因为我有很多事情要做。

To have many irons in the fire will make you exhausted.

太多事情要做会让你筋疲力尽的。