看一下这句话：Two years later, the McKay team announced that ALH84001, which scientists generally agree originated on Mars, contained compelling evidence that life once existed on Mars.
下文是对 life once existed on Mars的争论，没有再次涉及到 origianted on Mars 的话题。
[此贴子已经被作者于2005-2-23 11:34:44编辑过] | 
