Tsetse flies are found just in sub-Saharan Africa though only certain species transmit the disease.
采采蝇仅在南撒哈拉非洲存在，但只有某些种类的采采蝇会传播该病。
The disease, transmitted mainly by tsetse flies, is prevalent in 37 countries among the poorest of the world.
这一疾病主要是通过采采蝇传播，在全世界最贫困的37个国家中流行。
The disease is caused by the trypanosoma parasite. It is spread to humans through the bite of infected tsetse flies.
这种疾病由于锥体寄生虫引发，它是通过被感染的采采蝇叮咬传染给人类的。
For reasons that are so far unexplained, there are many regions where tsetse flies are found, but sleeping sickness is not.
出于迄今未得到解释的原因，在存在采采蝇的许多地区并未发现昏睡病。
Sleeping sickness occurs only in 36 sub-Saharan Africa countries where there are tsetse flies that can transmit the disease.
昏睡病仅发生在存在可传播该病的采采蝇的36个南撒哈拉非洲国家。
His research has linked levels of photosynthesis, detected from satellites, to the size of a vein in the wings of west African tsetse flies.
他的研究资料取自人造卫星，牵涉到光合作用的层次、到西非采采蝇翅脉的尺寸。
His research has linked levels of photosynthesis, detected from satellites, to the size of a vein in the wings of west African tsetse flies.
他的研究资料取自人造卫星，牵涉到光合作用的层次、到西非采采蝇翅脉的尺寸。
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