upper baffle plate

例句：

1. 1. Theupper baffle plate is designed to improvethe efficiency of the engine.
   上盖板的设计旨在提高发动机的效率。
2. 2. Theengineers replaced the oldupper baffle plate with anew one.
   工程师们用一个新的上盖板替换了旧的。
3. 3. The upperbaffle plate was installed in the engineto reduce noise.
   上盖板被安装在发动机中，以减少噪音。