1·This way, new hardware is introduced into the environment only as a duplicate copy of the other machines.
这样，可以将新硬件仅作为其他计算机的副本引入环境。
2·Otherwise, it's just storing in memory a duplicate copy of the POST data, which isn't needed.
否则，它仅在内存中存储POST数据的一个副本，而这没有必要。
3·The payment receipt of forwarder expense(a duplicate copy)is inquried.
要求提供货代费用的付费收据（副本即可）。