A: You seem to be very hesitant about doing things.

你似乎有事有点犹豫不决。

B: I don't know why I cannot take a step forward.

我不知道为何我做事就是没有进展。

A: You are meeting trouble halfway, I guess.

我猜你是杞人忧天。

B: Many things are troubling me. I don't know whether I should come or go.

我还有很多烦心事，我是进退两难。

A: That's where the shoe pinches.

这就是症结所在。