It is thought that these grooves help to channel water through the mouth and out the gill slits, thereby reducing water resistance.

人们认为这些沟槽有助于将水从嘴中输送到鳃裂外，从而减少水的阻力。

youdao

Those drugs are given by injection as well as through the mouth.

那些药品可以注射，也可以口服。

youdao

After the clean air filter, will directly into the air compressor pipe through the mouth to breathe in.

过滤后的清洁空气，将通过直接管段进入空气压缩机的吸气口。

youdao

Untreated patients can spread the bacteria from their nose and mouth through the air to people who are near them a lot.

VOA: special.2009.10.14

Patients with certain conditions, including hiatal hernias, don't qualify for heartburn surgery through the mouth.

WSJ: New Surgical Option for Heartburn

It was smelly inside the head, and I couldn't see much through the mouth opening.

WSJ: Getting Into a Character

This negative pressure causes the chest wall to expand and air is drawn into the lungs through the mouth and nose.

CNN: 'I lived in an iron lung for seven years'