The dog kept close at heel as his master picked his way through the muddy street. 误译：当主人小心翼翼地穿过泥泞的街道时，那条狗紧紧地用脚后跟走。 正确：当主人小心翼翼地穿过泥泞的街道时，狗紧跟在后面。 说明：at heel 的意思是“紧跟着……”。