mass：團；塊；堆。
My biggest emotional breakdown was last week after a visit to the vet. They
found a mass in my dog’s leg.
我最大的一次情緒崩潰是在上周看完獸醫之後。他們在我狗狗的腿上發現了一個腫塊。
All of a sudden, a mass of tissue was
thrown from somewhere into a corner
of the wall.
突然，一團衛生紙從某處拋落到一個牆角裡。
At this moment, another mass of tissue flew over again.
這時，又一團紙飛了過來。
Before the rain, the sky was a mass of
clouds.
下雨前，天空有一團雲。