15美元英语怎么写

例句：

今天早些时候，美元出现回升。

The dollar staged a recovery earlier today.

昨天，英镑对美元的`汇率上升了。

Yesterday the pound strengthened against the dollar.

这家银行有差不多一亿美元的股本。

The bank has a share capital of almost 100 million dollars.

他们已经承诺了数十亿美元的援助。

They have already pledged billions of dollars in aid.