基本解释梯形支架英汉例句双语例句Therefore, it analyses the tea sonability of trapezoid joist steel support and supporting pattern …从而分析留巷所采用的梯形“工”字钢支架，巷内架设抬棚的支护方式的合理性。词组短语短语irregular trapezoid support 不规则梯形支护