Even NASA says that there's no single, agreed upon, scientific classification for what makes a land mass a continent.

甚至美国宇航局也表示， 对于什么使陆地成为大陆， 没有单一的、 公认的、科学的分类。

It isn't so much a scientific classification as it is one that we use to refer to certain kinds of plants that we don't want versus the ones that we do.

这与其说是一种科学分类，不如说是一种我们用来指代我们不想要的植物与我们想要的植物的分类。

For scientific classification I have little mind; it does not happen to fall in with my habits of thought; but I like to be able to give its name (the " trivial" by choice) to every flower I meet in my walks.

对于科学分类，我不太在意；它碰巧不符合我的思维习惯；但我喜欢能够为我在散步中遇到的每一朵花命名（“琐碎”的选择）。