请问这句话的末尾怎么理解啊？
The idea of becomeing a writer had come to me off and on since my childhood in Belleville,but it wasn`t until my third year in high school that the possibility took hold.请问possibility took hold是什么意思？如何翻译？具体怎么理解？
take hold 扎根： The newly planted vines quickly took hold. 新种下的葡萄藤很快就扎下了根 译: 成为作家这个想法,自从我在贝勒维尔(Belleville)的童年,就断断续续地有过,但直到我高中的第三年,这个希望才真正根深蒂固. 注意下面几个语言点: possibility:"可能的事；可能发生的事",即"潜能；潜力；希望；美好的未来" take hold: 扎根 it wasn`t until .... 不是....直到....才...
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