future-arbitrage value safeguard

• 套期保值

future-arbitrage value safeguard的用法和样例：

例句

1. Certain gems retain value better than others.
   某些宝石的保值作用更高。
2. In order to keep its value, grandpa once exchanged all the money at home for foreign currency.
   为了保值，爷爷曾经把家里的钱全部换成外洋。