cavitation
/ˌkævɪˈteɪʃən/noun
mass noun
1- Physics the formation of an empty space within a solid object or body【物理】成穴。
1.1
- the formation of bubbles in a liquid, typically by the movement of a propeller through it气蚀, 空蚀（尤指因推进器运动而在液体中形成的气泡）。