园丁喜欢在后院种植外来物种，但本地种常常将开始在后院中生长的“外来”植物视为入侵者 — — 对过去的危险的偏离。
Gardeners may love to plant exotic species in their backyards, but communities often treat the “foreign” plants that begin to grow in the countryside as invasive – a dangerous departure from the past.