it will的缩写,it shall的缩写;
例句:
It'll be two pounds to get the bus.
乘公共汽车要花两英镑。
It'll cost them the princely sum of seventy-five pounds.
这将花费他们75英镑巨款。
You can have it, but it'll cost you a bundle.
你可以买下它,不过你要花一大笔钱。