由于接口设计不统一,工程师调试起来特别费劲。Yóuyú jiēkǒu shèjì bù tǒngyī, gōngchéngshī tiáoshì qǐlái tèbié fèijìn.Because the interface design is inconsistent, debugging is especially laborious for the engineers.
这个盖子太紧了,我拧了半天还是很费劲。Zhège gàizi tài jǐn le, wǒ nǐng le bàntiān hái shì hěn fèijìn.This lid is too tight, and even after twisting it for ages it is still hard going.
他年纪大了,爬楼梯很费劲。Tā niánjì dà le, pá lóutī hěn fèijìn.He is old now and climbing stairs is hard for him.