总是说要带科技下乡，把科学知识普及到广大农民手中，看看美国的科技下乡是如何做的？Looking for some reading material about farming? One place to look is the science magazine of the United States Department of Agriculture. The descriptions of work by the department's Agricultural Research Service can be complex. But the monthly magazine, called Agricultural Research, is generally …
发表于 2016-8-2 14:15:53