Scientists continue to push back the boundaries of human knowledge.

科学家不断扩大人类知识的范围。

Papa would push back his chair and pour a glass of red wine, ready to listen.

爸爸会推开座椅，倒上一杯红酒，准备仔细聆听。

But we have ways to push back.

但我们也有反击的手段。

But the pedals push back on me.

但踏板对我有反力。

Why didn't you push back on the pedals?

我不是告诉你了么，你怎么不踩那个踏板呢？