This is the 3297th most frequent Chinese word.
呼吸器
Respirator.
呼吸器 refers to a medical device that assists with breathing.
医生给病人使用了呼吸器。
The doctor used a ventilator for the patient.
呼吸器 in this sentence refers to equipment used for breathing underwater.
潜水员戴着呼吸器潜入深海。
The diver wore the breathing apparatus to dive into the deep sea.
呼吸器 here denotes protective respiratory equipment used in scientific environments.