恐惧;To test his theory, he went into the laboratory with a few auklet feathers.An analysis showed him the chemicals that make up the auklet's "odorant.
然而，
年后道格拉斯在白令海
圣劳伦斯岛上研
小海雀时，他才开始注意这种有着柑橘般
物质对蚊子功效。
To test his theory, he went into the laboratory with a few auklet feathers.An analysis showed him the chemicals that make up the auklet's "odorant.
然而，年后道格拉斯在白令海圣劳伦斯岛上研小海雀时，他才开始注意这种有着柑橘般物质对蚊子功效。
To test his theory, he went into the laboratory with a few auklet feathers.
而后，道格拉斯又使用在佛罗里达一个实验室中特别培养蚊子，进行了驱蚊性测试。
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