Even if a mosquito somehow managed to penetrate such a barrier, a second light curtain set up around a bed, for example, would provide further protection. Dr Marka envisages two or three light curtains in a home: one at the door, one around a sleeping person and one surrounding the area in which mosquitoes typically hide (under the thatched roof of a hut, for example). 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. Dr Marka, whose research is funded by the Gates Foundation, says that a prototype of his machine costs a little over $100.
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有人在敲门吗？
While the two were getting the money, the one at the door covering us with the gun obviously got a bit of an anxiety attack and started swearing at them, telling them to hurry up and get a move on.
就在这两个人在那里拿钱的时候，站在门口拿枪看着我们的那一个显然有些着急了，他开始骂骂咧咧地催促那两个人抓紧时间快点离开。
My eyes were becoming accustomed to the gloom and I was able to make out a door at one side of the room.
我的双眼逐渐适应了这种昏暗，能够看到那个房间的一侧有一扇门。
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