(noun.) the process whereby heavy molecules of naphtha or petroleum are broken down into hydrocarbons of lower molecular weight (especially in the oil-refining process).
德布斯录入
双语例句
Then the bridge blew and one horse snapped his halter when he rose and jerked his head at the cracking roar and he went off through the trees. 欧内斯特·海明威.丧钟为谁而鸣.
That was probably why the Communists were always cracking down on Bohemianism. 欧内斯特·海明威.丧钟为谁而鸣.
The wind howled dismally all night, and strange cracking and groaning noises sounded here, there, and everywhere in the empty house. 威尔基·柯林斯.白衣女人.
In a day or two this becomes a deeper brown, and more or less disorganized, cracking, either round the edge, or right across the center, so that it can be readily peeled away. 威廉K.戴维.智者、化学家和伟大医生的秘密.
With that second shot came the cracking boom of grenades from around the corner below the bridge. 欧内斯特·海明威.丧钟为谁而鸣.
He had rushed down the stairs and flung across the street in a minute--the yellow postilion was cracking his whip gently. 威廉·梅克比斯·萨克雷.名利场.
The boom was a sharp crack that widened in the cracking and on the hillside he saw a small fountain of earth rise with a plume of gray smoke. 欧内斯特·海明威.丧钟为谁而鸣.
The nutcracker (Fig. 101) is an illustration of a double lever of the wheelbarrow kind; the nearer the nut is to the fulcrum, the easier the cracking. 伯莎M.克拉克.科学通论.
It's a family business, sir, says George, cracking filberts. 威廉·梅克比斯·萨克雷.名利场.
At that moment there was a cracking noise, and his figure fell into fragments like a pack of cards. 托马斯·哈代.还乡.
Then they both laughed, and began cracking nuts, and spitting the shells about. 查尔斯·狄更斯.远大前程.
The gun was firing now with the rocket whish and the cracking, dirt-spouting boom. 欧内斯特·海明威.丧钟为谁而鸣.
To avoid cracking the vial by exposure to such sudden heat use a thin green glass vial and hold it in the steam for a few seconds before immersing it in the hot water. 威廉K.戴维.智者、化学家和伟大医生的秘密.
Is it not possible that graft is the cracking and bursting of the receptacles in which we have tried to constrain the business of this country? 沃尔特·李普曼.政治序论.
The rollers operate in sets, and successive crackings are obtained by passing and repassing, if necessary, the grain through these rollers, set at different distances apart. 威廉·亨利·杜利特.世纪发明.