aerospace and defense造句

例句与造句

1. The rolling bearing work conditions are becoming more and more sever in the space aerospace and defense fields , such conditions are usually high speed , high temperature , and heavy load
   航空、航天和国防领域使用的滚动轴承工作的条件都极其苛刻,其工况主要为高速、高温、重载。
2. It's difficult to find aerospace and defense in a sentence. 用aerospace and defense造句挺难的