名词中文翻译1
中文翻译：Unknown
同义词：
['subordinate', 'lower grade', 'lower division', 'subdivision']
例句：
-
1. The subgrade is the lowest level of a mountain.
子层是山的最低层。
-
2.The subgrade was damaged during the earthquake.
地震损坏了子层。
-
3.The subgrade was used for building new roads.
子层被用来修建新路。