They are engaged in what they're doing.

他们忙于他们所做的事情

I like to be engaged in fitness!

我喜欢进行健身活动。

I'd be engaged in studying Chinese poetry.

因为我会学习中国诗词。

So, it can be engaged in the shipment of wood.

对了，它可以用来装载木头。

People of all ages were supposed to be engaged in this work.

不同年龄的人们应该是从事这项工作。

And surely the whole of Asia cannot be engaged in a statistical fraud.

并且可以肯定，整个亚洲不可能同时参与统计造假。