几十年过去了，作为观赏植物的仙人掌，许多珍贵品种已成为人们餐桌上的宠物。
B-Time I-Time I-Time O O O O O O O O B-Thing I-Thing O B-Thing I-Thing I-Thing O O O O O O O O O O B-Person I-Person B-Location I-Location I-Location O B-Thing I-Thing O