In fact it is free of charge at the weekend.

事实上，在周末这是免费的。

THREE WOLVES charge at once.

三只狼同时发动了攻击。

Then I don't charge at all.

我就不会要任何费用。

They do not charge at all for their services.

他们的服务概不收费。

They'll charge at least 50 dollars for doing it.

做这工作他们至少要索50美元。