(noun.) a usually brief attempt; 'he took a crack at it'; 'I gave it a whirl'.
(noun.) a purified and potent form of cocaine that is smoked rather than snorted; highly addictive.
(noun.) a blemish resulting from a break without complete separation of the parts; 'there was a crack in the mirror'.
(noun.) a sudden sharp noise; 'the crack of a whip'; 'he heard the cracking of the ice'; 'he can hear the snap of a twig'.
(noun.) a long narrow opening.
(verb.) break into simpler molecules by means of heat; 'The petroleum cracked'.
(verb.) reduce (petroleum) to a simpler compound by cracking.
(verb.) become fractured; break or crack on the surface only; 'The glass cracked when it was heated'.
(verb.) cause to become cracked; 'heat and light cracked the back of the leather chair'.
(verb.) break partially but keep its integrity; 'The glass cracked'.
(verb.) tell spontaneously; 'crack a joke'.
(verb.) hit forcefully; deal a hard blow, making a cracking noise; 'The teacher cracked him across the face with a ruler'.
(verb.) make a very sharp explosive sound; 'His gun cracked'.
(verb.) gain unauthorized access computers with malicious intentions; 'she cracked my password'; 'crack a safe'.
校对:弗恩
整理:利亚