It was amniotes that evolved the eggshell, a development which let them sever all connection with the water by laying their eggs on land.
正是羊膜动物进化出了蛋壳，这一进化使其可以在陆地上产卵，由此彻底切断与水的所有联系。
Finding the causes of the breakdown of pipeline of the water supply companies is the key to sever the customer.
找出引起供水公司管网故障的原因是供水公司进行客户服务的关键。
Water removal capability of different flow fields and dynamic water removal technologies are reviewed. Finally, sever advices about water management of PEMFC we...
分析了双极板不同流场排水能力和动态排水技术，并对质子交换膜燃料电池水管理提出一些建议。
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