Mosquito three, mosquito four, mosquito jumping on the door.
蚊子三号，蚊子四号。蚊子跳上门。
Dr Marka calculates that if there is a 6% chance that a mosquito will penetrate a light curtain, and a hut contains four curtains, then only one in 100,000 mosquitoes will be able to spread malaria.
马尔卡博士估算假如一只蚊子有6%的机会穿过光帘幕，并且一个草屋设有四道帘幕，那么在一百万只蚊子中仅有一只有机会能够传播疟疾。
After the bite of an infected mosquito, onset of illness occurs usually between four and eight days but can range from two to 12 days.
被受感染蚊子叮咬后，通常在4- 8天内发病，但也会在2- 12天的范围内发病。
A: dengue is transmitted by the bite of an Aedes mosquito infected with any one of the four dengue viruses.
答：登革热由一种受染于四种登革热病毒中任何一种病毒的伊蚊叮咬所传播。
There are around 3,000 mosquito species around the world, about four or five dozen of which are of concern to humans because they can transmit serious diseases.
世界上大约有3000种蚊子，其中大约有四、五十种蚊子对人体有害，因为它们能传播严重的疾病。
There are around 3,000 mosquito species around the world, about four or five dozen of which are of concern to humans because they can transmit serious diseases.
世界上大约有3000种蚊子，其中大约有四、五十种蚊子对人体有害，因为它们能传播严重的疾病。
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