Can I bum a cigarette off you?可以向您要支烟吗?Why don’t you stop behaving like a bum and get this place cleaned up?你不要再像一个懒鬼的样子，赶紧把这地方收拾一下好吗？He looks like a bum who's been drowning his sorrows in sleazy dives.他看起来象个游手好闲之辈,...
自交能孕性在不同的无性系中是明显不同的.There are obvious differences between clones with regard to their self - fertility.反交和自交通常不包括在内.Reciprocals and selfs are usually excluded.俄维农自交和野百合自交可以获得自交果实和自交胚.Fruits and embryos were obtained by s...