精选优质文档-倾情为你奉上高中英语阅读理解科技类二Medical drugs sometimes cause more damage than they cure. One solution to this problem is to put the drugs inside a capsule, protecting them from the bodyand the body from themuntil they can be released at just the right spot. There are lots of ways to trigger(引发) this release, including changing temperature, acidity, and so on. But triggers can come with their own risks- burns, for example. Now, researchers in California have designed what could be a harmles
