另两个为胸腺嘧啶和胞嘧啶, 即称为嘧啶的单环结构.The other two, thymine and cytosine, are single ring structures called pyrimidines.蕨类植物和针叶树的木质部仅含有管胞.The xylem of ferns and conifers contains only tracheids.胞质流还仅仅是一种解释真菌中转移的假说.Streaming is still...
结论髋臼前倾角的发育在儿童期较为缓慢.Conclusions The development of acetabular anteversion in children is a slow process.脱位和髋臼位置 、 颗粒和不足的外展肌力有关.It is related to cup position, wear or deficient abductor mechanism.目的探讨髋臼双柱骨折的临床特点和手术治疗.Objec...
Allow me to introduce you to our headmaster.请允许我介绍你见见我们的校长。The headmaster elaborated upon the idea for a new school uniform.校长就制作新校服的想法作了说明.I asked my headmaster if he could arrange a collection for a refugee charity.我问校...
大多数钢瓶设计了温度升高时的泄压装置.Most cylinders are designed to vent contents when exposed to elevated temperatures.过水压保护功能,可在水压超高时自动泄压.Over the protection of water features in ultra - high pressure relief automatically.介绍了电磁泄压阀在锅炉过热装...