He stopped to watch his son's fruitless efforts.

他停下来看儿子徒劳的努力。

youdao

In reality, however, these efforts have been fruitless.

在现实中，但是，这些努力已徒劳的。

youdao

In reality, however, these efforts have been fruitless.

在现实中，但是，这些努力已徒劳的。

youdao