怎么absence or mind 和absence of mind 都可以?都是心不在焉的意思?

in the absence or presence of PGE2 怎么翻译? absence与absent的意思? in the absence of 怎么用 absence与absent的意思与区别? in absence of 和 in the absence of 有什么区别麻烦告诉我 in absence of 和 in the absence of 有什么区别 absence minded 和 absent minded 的区别 a month or two's absence应怎么翻译 absence的sence是什么意思? absence of evidence is not evidence of absence Absence of proof is not proof of absence. in the absence of 造句