Take out the seeds and put it in a container. Put some water in it and wait for couple of days until the coating on the seeds rot away. The good seeds are the ones that sink in the bottom.
BTW, I have bought some heirloom tomato seeds last year. And it has green tomato seeds in them if anyone is looking for it. There is also a very nice cherry tomato variety in it that taste very good and has a very high yield.

就可以顺便尝尝其貌不扬的那些的味道了。另外我家房侧有几棵木槿，粉色和白色，下面有很多种子掉到土里自然长出来的小苗，约20cm高，谁需要请自己来动手挖。非常多，随便挖就是。