crustKK [ˈkrʌst] ｜ /ˈkrʌst/
GEPT 中高級
C1noun
a hard outer layer that covers something
After baking for 30 minutes, the crust of the apple pie turned golden brown.
硬皮；外殼
C2noun
the outer layer of the Earth
The crust of the Earth is made up of tectonic plates that constantly shift and collide.
C1verb
to form a hard outer layer; to develop a thick surface
After sitting in the fridge overnight, the cream pudding began to crust over, forming a delicious skin on top.
結成硬皮；形成外殼
C2noun
impolite behavior or language that shows a lack of respect; rudeness
During the meeting, John interrupted his colleagues repeatedly and made derogatory comments, demonstrating his crust and lack of professional etiquette.