zài / gōng chéng / shè jì / zhōng / wǒ men / xū yào / kǎo lǜ / lì ǒu / duì / jié gòu / de / yǐng xiǎng在工程设计中,我们需要考虑力偶对结构的影响。In engineering design, we need to consider the effect of couples on structures.