BBC在线收听下载:美国绿党在宾州启动申请重新计票程序

短语讲解：

1. Scientists have warned that Arctic ice has melt at an uNPRecedented rate because of unusually high temperatures.

because of 因为，由于
例句：It is mainly because of my fault.
这主要是由于我的过错。

2. Tens of thousands of people have been allowed to return to their homes in the Israeli city of Haifa after firefighters gain control of massive blazes, a number of Palestinian fire crews have been assisting.

a number of 一些; 许多的
例句：We had to face up to a number of seemingly contradictory concerns.
我们不得不正视若干看起来相互矛盾的问题。