crack/kræk/

v. (make sth) break so that it gets lines on its surface or breaks into pieces

n.

➊ a very narrow space opening between two things or two parts of sth

➋ a thin line in the surface of sth that is broken but not separated into pieces

v. [T; I] （使）裂开；（使）破裂：The storm cracked the window. 暴风雨吹裂了窗户。

◇The mirror cracked when she dropped it. 她把镜子打在地上摔裂了。

n. [C]

➊ 裂口；裂隙：She opened the door a crack. 她把门打开了一条缝。

➋ 裂纹；裂缝：[crack in sth] There are a few cracks in the mirror. = The mirror has a few cracks. 镜子有几条裂缝。

音组ack/-æk/

attack; back; black; lack; pack; snack; track