我最近感到呼吸有点困难。

Wǒ zuìjìn gǎndào hūxī yǒudiǎn kùnnán.

Lately I’ve been having a bit of trouble breathing.

做瑜伽的时候要保持呼吸。

Zuò yújiā de shíhou yào bǎochí hūxī.

When doing yoga, you need to keep breathing steadily.

他紧张得呼吸急促。

Tā jǐnzhāng de hūxī jícù.

He was breathing rapidly due to nervousness.