Dogger series是什么意思

用法例句

The paper analyzes the accident of the broken intake grid installed in the water passage of some ships which use the waterjet pump,and calculates the case from both the static and dynamic perspective.

针对某些采用喷水推进装置船舶在流道进水口处安装的格栅被损坏的例子,从静力特性和动力特性两个方面进行分析,找出了格栅被损坏的原因,为流道格栅的合理设计和安装提出建议。

A Slave s Awakening and StrivingAn After——Reading Interpretation to the Narrative of the Life of Frederick Douglas, an American Slave;

一个奴隶的觉醒与奋斗——解读《黑人奴隶弗雷德里克·道格拉斯的生平自述》