The engineering report explains how air rarefaction at high altitude affects cargo plane performance.

這份工程報告說明高海拔的空氣稀薄如何影響貨機性能。

Before the flight, the pilot briefed passengers on cabin pressure and air rarefaction.

起飛前，機長向乘客簡報艙壓與空氣稀薄的情況。

Our client asked the sales team to explain the rarefaction inside the vacuum packaging machine.

我們的客戶請業務團隊說明真空包裝機內部的稀薄化現象。