hy.dro.crack.ing
n.（名词）A process by which the hydrocarbon molecules of petroleum are broken into simpler molecules, as of gasoline or kerosene, by the addition of hydrogen under high pressure and in the presence of a catalyst.氢化裂解：将石油的含氢分子分裂成更简单的分子（象汽油和煤油的分子）的过程，此分裂过程是在加催化剂及高压氢气的条件上进行的
