The lab report noted a small fluid sac on the sample, so testing was delayed.

實驗室報告指出樣本上有一個小液囊，因此檢測延後了。

Our medical supply catalog lists replacement air sacs for the portable breathing units.

我們的醫療用品型錄列有可攜式呼吸器用的替換氣囊。

The shipping crate included a protective gel sac to cushion the fragile glass sensors.

運貨木箱內附有一個保護用凝膠囊，用來緩衝易碎的玻璃感測器。