You should ask your professor to put some of the copies on reserve.
你应该让你的教授保留一些复印件。
They collect margins on every trade; members put money into a reserve fund as well.
他们从所有交易中得利；同时成员们将钱存入一个储蓄基金。
He had been put on the reserve list and retired.
他一直处于后备和退休人员名单中。
He had been put on the reserve list and retired.
他一直处于后备和退休人员名单中。
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