cracking
英 ['krækɪŋ]
美['krækɪŋ]
- adj. 重大的；敏捷的；出色的
- adv. 非常；极其
- n. 破裂；分馏
- v. 破裂；打开；变声（crack的ing形式）
英英释意
- 1. a sudden sharp noise;
- "the crack of a whip"
- "he heard the cracking of the ice"
- "he can hear the snap of a twig"
- 2. the act of cracking something
- 3. the process whereby heavy molecules of naphtha or petroleum are broken down into hydrocarbons of lower molecular weight (especially in the oil-refining process)