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.
即使蚊子能穿过一道此类屏障，第二道光幕，比如说设立在床周围，会提供进一步的保护。
2
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.