短语讲解：

1. Many areas around the world suffer from frequent loss of electrical power.

suffer from 患（某种病），受（某种病痛）折磨
例句：I often suffer from unaccountable headaches.
我常莫名其妙地头疼。

2. Experts say that small generators should always be located outside and at least 4.5 meters from the home.

at least 至少
例句：At least, I sincerely hope so.
至少我是真诚地这样希望的。

3. Scientists also warn that long-term contact with low levels of carbon monoxide can lead to difficulty thinking, memory loss and depression.

contact with 与…有交往[联系]
例句：No, I have no contact with her.
没有。我和她没有一点儿联系。

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