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，直
几年后道格拉斯在
的圣劳伦斯岛上研
小雀时，他才开始
这种有着柑橘般气味的物质对蚊子的功效。
雀（北太平洋地区一种鸟）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，直几年后道格拉斯在的圣劳伦斯岛上研小雀时，他才开始这种有着柑橘般气味的物质对蚊子的功效。
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的蚊子，进行了驱蚊性的测试。
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