the Jurassicðəˌdʒʊˈræsɪk短语²⁶⁵⁰⁹ 基本例句 侏罗纪 The Jurassic formation is drilled through. 侏罗系地层已钻穿。 iciba The second stage is the Jurassic Huashan main body granite, also of crust mantle mixed type, with a higher crustal source to mantle source ratio. 第二期燕山早期花山主体花岗岩亦属壳幔混合来源，但其壳幔物质比值有所增高。 cnki