成双的袜子是别在一起的.Pairs of socks are pinned together.鸟常常成双配对.Birds often pair for life.虽未成双,却也海誓山盟,私传表记, 已有无限的风情了.Although they had not made love , they had secretly exchanged solemn vows and pledges, bearing their hearts to e...

“成双”的英语可以翻译为：[医] gemination，atwain ...