No. Previously people thought alpine swift would spend the

No. Previously people thought alpine swift would spend the

所有跟贴·加跟贴·新语丝读书论坛

送交者: cornbug 于 2016-10-30, 23:05:31:

回答: cornbug，你是鸟类专家，有个问题请教一下，由 coubert 于 2016-10-30, 22:23:33:

whole life aloft but the study shows they only have 200 days of flying in sky. That is long enough.

BTW, I am not a 专家 in any field.

哦，你谦虚了 (无内容) - coubert (0 bytes) 2016-10-31, 02:46:50 (820214)