it is if you exercise it, meaning you say,

就是去执行这份期权也就是说
I will use my right to buy or sell.

你要行使你买卖资产的权利
The other party is the writer of the option.

期权合约的另一个参与者是卖方
Because it's a contract, it has to be between two parties.

因为这是一份合约必有两方参与
Somebody is on the other side

有买就有卖
and you can do either one; you can either buy or write an option.

你可以选择你的角色买方或卖方
If you--let me make this clear; if you write a call option,

说得更明白些如果你卖出看涨期权
then what you are committing yourself to do as the writer--

你就要按照卖方的规矩去行事
you sign the contract from the writer's contract,

你要签署卖方合约
which goes along with the buyer's contract.

与买方合约相对应
Well, it provides rights to the buyer.

这样你就向买方提供了权利
If you write a call option,

如果你要卖一份看涨期权