VOA慢速英语:South Africa Faces an Outbreak of Rift Valley Fever

watch for守候,注意,监视

例句：She was watching for the postman.
      她正留意着等邮差送信来。

2. Infected mosquitoes can also pass the disease to humans. So can drinking unpasteurized or uncooked milk from infected animals.

So can，后面说的句子和前面属于同一种情况，表示...也是如此，用so+系动词、助动词、情态动词+主语来表示。如果表示...也不的否定形式，将so换成neither.

3.Some patients do not get sick at all.

not at all一点也不,丝毫不

例句：I was not at all pleased with the results.
      我对结果觉得一点也不满意。

     I came near to not doing my homework at all.
     我几乎不作家庭作业。

4.Current vaccines to protect against Rift Valley fever are limited to use in animals.

protect against保护, 保卫

例句：We protected him against his enemy.
      我们保护他使他不受敌人侵犯。

     You need warm clothes to protect you against the cold.
     你需要暖和的衣服来御寒。