他们已经学会了如何使用链锯，以及如何管理林地。

They have learnt how to use a chain saw and how to manage the wood.

youdao

他们许多说通过使用英语学会了。

Many said they leant by using English.

youdao

许多说他们通过使用英语学会了。

Many said they learnt by using English.

youdao

许多说他们通过使用英语学会了。

Many said they learnt by using English.

youdao