科学美国人60秒:甜味剂抑制害虫-托福听力下载

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　　科学美国人60秒中英文翻译：甜味剂抑制害虫

　　科学美国人60秒英文文本

　　You can catch more flies with honey than with vinegar.

　　But if you want to kill them, you might try Truvia.

　　Because a new study shows that the active ingredient in this popular sweetener can act as an insecticide.

　　The study began as a sixth-grade science-fair project.

　　Eleven-year-old Simon Kaschock-Marenda noticed that his parents had stopped using sugar.

　　So he decided to see how different sweeteners affect the health of fruit flies.

　　甜味剂.jpg

　　He and his dad, a card-carrying biologist, offered the flies food spiked with a variety of no-cal sweeteners.

　　Six days into the experiment all the Truvia-fed flies were dead, while those stuck with Sweet-n-low, Splenda or Equal lived five to seven weeks.

　　Why Truvia makes flies drop like flies is still a mystery.

　　Back in the lab, the researchers confirmed that the bugs weren't starving: they all continued to eat.

　　Most actually seemed to prefer Truvia to real sugar when offered a choice, findings published in the journal PLOS One.

　　Next, the researchers will see if the sweetener kills other bugs, like cockroaches or ants.

　　Until then, try tossing a little Truvia in your coffee, and on the counter.

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