A burro is carrying salt of one large bag backcross a river.有一头驴子驮着一大袋子盐过河.The method can be conveniently applied to practical backcross breeding programs.该方法可以很方便地应用于实际的回交育种....
They started me off in the gardens as a handyman. Digging, forking manure, that kind of thing.他们让我先在园子里干些杂活，挖土、叉粪肥之类的。He is an invaluable handyman to have about the place.他是这一带非常可贵的巧手.So you're a handyman and a fugi...