找出哪些是本地植物，哪些是外来的。
Find out which of these are native plants and which are exotic.
我们正在做的另一件事是除掉生长在花园里的一些外来物种，并种回一些本地植物和树木。
The other thing we're doing is getting rid of some of the foreign species that are growing in the gardens and putting back some native plants and trees.
一种非本地的植物通过占用土壤中的养分来扼杀本地植物。
A non-native plant chokes out native plants by hogging the nutrients in the soil.
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