machine construction短语¹⁴⁴⁹⁷²⁺² 基本例句 机器结构 Static trials are necessary as methods of projection and estimation of airplanes for their endurance used in the machine construction are ideal and different from reality. 静力测试很必要，正如在制造时对于飞机的耐久度进行的计算和估计一样，但是理想状态与现实情况是有区别的。 yeeyan