Sorry,there is not text temporarily, Please help tingroom to look for it! 如果您能找到更好的听力原文,请发贴到 听力原文收集区 ,您将会获得 10 到 30 积分的奖励 ! Thank you !...
This is Scientific American - 60 second Science. I'm Christopher Antaryata. Got a minute? We humans take medicine when we are sick. As due our primate cousins, chimps, for example, snack on a bitter African shrub to combat intestinal worms. But the h...