名词
中文翻译：主梁
同义词：
['main beam', 'mainstay例句：1. The construction of the bridge was completed ahead of schedule.（桥梁的建设提前完成。）2. The main beam of the ship is made from steel.（这艘船的主梁是用钢制成的。）3. The mainstay of the economy is agriculture.（经济的主要支柱是农业。）']
例句：
-
1. The construction of the bridge was completed ahead of schedule.
桥梁的建设提前完成。
-
2. The main beam of the ship is made from steel.
这艘船的主梁是用钢制成的。
-
3. The mainstay of the economy is agriculture.
经济的主要支柱是农业。