老外是这么说“知道了”的： I know. I know what you mean. I know what you're talking about. I hear you. I see what you're saying. I see where ...

写英语邮件，开头须写得正式得体，尤其是向素不相识的人发邮件。比如，一个你不认识的人这么喊你： “喂！那边那谁，给我过来。” 你会二话不说立马就跑吧？这要不就是抢劫，要不...

migratory bird候鸟；migration迁徙；bird-watcher观鸟人；Oriental snowy plover东方环颈；cuckoo布谷鸟/杜鹃；nightingale夜莺；skylark云雀；wild goose大雁；swallow燕子；swan天鹅；hummin...