送交者: chouqilozi 于 2012-05-25, 15:09:56:

回答: 一般·。在火车上总要瞄几眼。 由 cornbug 于 2012-05-25, 14:39:38:

• one way to do it is to see the reflectance from the window. (无内容) - cornbug (0 bytes) 2012-05-25, 15:22:05 (666872)

加跟贴