1991年，当那第一颗绿苹果树遭受蜜环菌的危害时，它的栽培者确定他们需要一个备用计划。
In 1991, when the tree was suffering from a bout of honey fungus, the growers decided they needed a back-up plan.
1991年，当那第一颗绿苹果树遭受蜜环菌的危害时，它的栽培者确定他们需要一个备用计划。
In 1991, when the tree was suffering from a bout of honey fungus, the growers decided they needed a back-up plan.
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