zài / shè jì / qiáo liáng / lián jiē jiàn / shí / bì xū / què bǎo / qí / néng gòu / chéng shòu / fǎn fù / biàn huà / de / jiǎn yìng lì

在设计桥梁连接件时，必须确保其能够承受反复变化的剪应力。

When designing bridge connectors, it is essential to ensure that they can withstand repeatedly varying shear stress.