lower cretaceous是什么意思

lower cretaceous是什么意思 lower upper cretaceous是什么意思 请教高手帮忙翻译一段（最好是懂点地质学的）Benthic microbial mats: a possible major component of organic mattera ccumulation in the Lower Aptian oceanic anoxic eventABSTRACTOceanic anoxic events (OAEs) throughout the Cretaceous we lower your voice的反义词是什么? Open lower right cover ang remove paper.这句英文是什么英意?我的打印、复印一体机坏了屏上就有这句英文不知什么意思! lower ground lower是什么意思 lower是什么意思 lower-brow shuttle lower the third cretaceous 怎么翻译啊 谢谢高手们 steel pipe,S235JR grade,black tube 是什么钢管,CEV:lower than 0.35% , Investors also tend to have lower turnover in their portfolios.这句话什么意 VF函数问题lower Lower compression 3Q lower-case是什么意思 lower-case letter是什么意思