That way the higher pressure inside the cabin pushes the door into its frame, creating an airtight seal.

这样， 机舱内较高的压力就会将门推入框架，形成一个密闭的密封。

Since sound waves lose speed and clarity when traveling through air, this gooey substance ensures an airtight seal between the body and the wand emitting ultrasound waves.

由于声波在空气中传播时会失去速度和清晰度，这种粘性物质可确保身体和发射超声波的魔杖之间的气密密封。