conditional coefficient of variation是什么意思

conditional Present conditional first conditional 英语中one conditional,second conditional,third conditional second conditional与third conditional的区别 Conditional offer firm acceptance conditional approval是什么意思 conditional access是什么意思 conditional coefficient of variation是什么意思 conditional offer 转成 unconditional offer conditional sentences翻译成中文 conditional approval是什么意思及反义词 past real conditional 的句型是什么? voluntary conditional general offer何意? air-conditional,air-conditioned的区别 英语翻译同上.还有conditional pass 又是什么 请问second conditional句型条件从句为什么要用过去式? zero conditional这种条件句中文翻译成什么?