upper cover的用法和样例：
例句
- Doors Open Both the FRONT DOOR and UPPER HOOD are open.
前门和上盖一起开。 - And every open vessel that has no cover fastened on it is unclean.
凡敞口的器皿，就是没有扎上盖的，也是不洁净。
upper cover的相关资料：
临近单词
upper fan
upper
Upper margin of aryepiglottic fold
Upper-triangular operator matrix
upper energizer managing reception
Upper thoracic vertebrate fracture
Upper Soft Tissue Dynamic Enhanced
upper semicontinuous decomposition
Upper probability limit for damage
upper gastronintestinal hemorrhage
upper-mlddle class intellectuals
Upper Cretaceous Zhutian Formation
