To drop the ball that fast means she's learning respectful play.

把球扔得那么快意味着她正在学习尊重游戏。

And I know him. He is not going to drop the ball.

我们也了解他，他不会犯错误了。

I'd never known Rob to drop the ball on anything until recently.

直到最近，我才知道 Rob 会在任何事情上投球。

The expression " to drop the ball" means not to do what you are supposed to do, to be unreliable.

“to drop the ball” 这个表达的意思是不做你应该做的， 不可靠。

" To drop the ball" is an expression meaning not to do something that you are supposed to do, not to meet your obligations, not to do what people expect you to do.

是一种表达方式， 意思是不做你应该做的事情， 不履行你的义务， 不做人们希望你做的事情。