All carbon footprints are hard or impossible to pin down accurately, but the Internet is a particularly complex case.
所有的碳足迹都很难或者不太可能精确地算出来,对于互联网,情况更是复杂。
2
See, the firing pin is the key to the whole case!
瞧,那撞针是整个枪的关键!
3
If it is successful (in this case, the PIN returned by Twitter), it will get an access token with which the client can update the Twitter status on the user's behalf.