广播电视英语短句 第 125 课：裂谷热-4

And some patients bleed to death. 并且有些病人会流血致死。

The World Health Organization says Rift Valley fever was first discovered in Kenya in nineteen thirty-one. 世界健康组织表示，第一次发现裂谷热这种疾病是在1931年的肯尼亚。

In the year two thousand, it was identified in Saudi Arabia and Yemen. 2000年的时候，这种疾病又在沙特阿拉伯和也门被鉴定出来。

These were the first reported cases of Rift Valley fever outside of Africa. 这是第一次在非洲以外的地方检测出来的裂谷热案例案例。

Current vaccines to protect against Rift Valley fever are limited to use in animals. 近来保护抵抗裂谷热病的疫苗限制只用于动物。