If you're going to study dragonflies, you want to study those really bright beautiful ones, like that red one. Or the really rare ones, the endemic endangered ones.
如果你要去研究蜻蜓的话，你会想去研究那些颜色很鲜亮美丽的， 像那只红的，或者那些很稀有的，本地濒危种类。