cracking christmas是什么意思

cracking christmas是什么意思 催化裂化为什么叫 FCC?Catalytic Cracking与Fluid Catalytic Cracking有什么区别,不都是催化裂化的意思吗?那FCC是表示Fluid Catalytic Cracking　还是　Flowing Catalytic Cracking? get cracking 圣诞老人是Christmas Father还是Father Christmas? 是on Christmas还是at Christmas? get cracking是什么意思 get cracking about get cracking是什么意思 fluid catalyst cracking Christmas, Christmas Christmas Christmas Christmas 是在几月 christmas’day是啥意思 merry Christmas~,是啥意思 merry.christmas是啥意思 Christmas是怎么读的?