慢速英语:World Leaders to Sign Climate Agreement on Earth Day

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短语讲解：

1. Since 1970, every year people around the world observe the day by doing different activities to clean up the environment.

clean up 打扫
例句：We should clean up the past-due bills.
我们应该清理逾期票据。

2. Super Cyclone Winston crashed into the island nation last February, killing 44 people and causing $1 billion in damage.

in damage 损失
例句：The meeting was merely an exercise in damage limitation.
这次会议只是控制损失的一项举措。

3. And we all have to be fearful about what this means—not only for ourselves, but for future generations.

but for 要不是
例句：I'd have been lost but for you.
要不是你，我就走迷路了。

4. First, at least 55 parties to the United Nations Framework Convention on Climate Change must ratify the agreement.

at least 至少
例句：He's been away for at least a week.
他走了总有一个星期吧。