他正在研究野生植物的药物特性。
在大约一千年前，鸦片可能由阿拉伯商人引入到中国和印度，并很快因其药物特性而引起广泛地重视。
It was probably introduced to both China and India by Arab traders about a thousand years ago, and soon came to be widely valued for its medicinal properties.
测试这些纳米粒子释放药物特性的实验结果显示，药物释放的最佳时期大约是八小时后，而且药物释放还将继续持续一周的时间。
Experiments to test the drug-release characteristics of these nanoparticles showed that maximum release occurred at approximately eight hours and then remained close to that level for a week.
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