intra cavity的用法和樣例：
例句
- The air in the middle ear cavity also expands and contracts with changes in atmospheric pressure.
中耳腔內的空氣會(huì )隨氣壓轉變而膨脹或收縮。 - The Straight Sided Insert is a threadless check valve designed to be inserted into any cavity where a check valve is needed and threads are not desired.
直面插入式閥門(mén)是一款用來(lái)插入到任何需要止回閥但不需螺紋的空腔內的無(wú)螺紋止回閥。
