So why was it suddenly so hard to breathe?

那么，究竟是为什么突然间会感到难以呼吸了呢？

youdao

I patiently explained to him, "Son, you can't blow so hard; you must ever so gently breathe on the loop to make bubbles."

我耐心地向他解释：“孩子，你不能吹得这么猛；你必须轻轻地在环上吹气，这样才能吹出泡泡。”

youdao

Several times, I wanna give up because I feel so tired or even hard to breathe.

有几次，我累的连呼吸都困难以致想到放弃。

youdao