他们在农场应用了永续农业原则，模仿自然生态系统来种植作物。

They applied ___permaculture principles on their farm, mimicking natural ecosystems to grow crops.

他们采用永续农业的理念，通过观察自然模式来设计可持续的花园。

They follow ___permaculture principles by observing natural patterns to design sustainable gardens.