Can how long call in cost?

多长时间能收回成本？

A combination of a long futures contract and a long put, called a synthetic long call.

由买入一个期货合同和买入一个看跌期权的组合，就叫做组合买入看涨。

If you're planning on using up the entire calling card on one very long call, this deal may be for you.

如果您打算在一次时间超长的长途电话中用完整张电话卡，这种电话卡也许会适合您。

The labor-force has the Characteristic of options value and the regions with labor inflow are equivalent to hold a long call option of the floating population.

流动人口的劳动力价值具有期权特征，劳动力流入地相当于持有一份买入看涨期权。

Portals attempt to create what they call sticky content to keep a user as long as possible.

门户网站试图创建他们所谓的粘性内容，以尽可能长时间地留住用户。