有两种方法：摘叶和割茎。
它们与摘叶期至盛花期天数的相关系数分别为-0.62和-0.45，经检验，差异达到显著水平。
Their correlation coefficients with the days from picking off leaves to full flowering phase were-(0.62) and(-0.45), respectively(P<0.05).
记的小时候，我经常去那里玩，那时我还小，以为这是很多见的、我早以司空见惯的银杏树，没有什么奇怪的，于是我就摘银杏叶，把它当作我的玩具。
Remember a child, I often go there to play, I was still small, thought it was a lot to see, as I have in common the ginkgo tree, there is nothing strange, so I picked Ginkgo biloba on it as my toy .
哈桑盘腿坐着，阳光和石榴叶的阴影在他脸上翩翩起舞。我念那些他看不懂的故事给他听，而他则心不在焉地摘着地上杂草的叶片。
Sitting cross-legged, sunlight and shadows of pomegranate leaves dancing on his face, Hassan absently plucked blades of grass from the ground as I read him stories he couldn't read for himself.
哈桑盘腿坐着，阳光和石榴叶的阴影在他脸上翩翩起舞。我念那些他看不懂的故事给他听，而他则心不在焉地摘着地上杂草的叶片。
Sitting cross-legged, sunlight and shadows of pomegranate leaves dancing on his face, Hassan absently plucked blades of grass from the ground as I read him stories he couldn't read for himself.
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