合约单位为一个主要参考货币的货币单位。
The Contract unit will be one currency unit of the primary reference currency.
选择权合约交易的数量与单位履约价格的乘积；
The strike price of an option times the number of underlying securities in the contract.
选择权合约交易的数量与单位履约价格的乘积；
The strike price of an option times the number of underlying securities in the contract.
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