报道说，明年1月，旧金山市环保局将回收这些圣诞树，将它们种植在城市的街道旁。这一行动可为旧金山市增加12.7万株新树。
In January, city workers will retrieve the rented trees and plant them on city streets, which can accommodate 127,000 more trees, according to the department.
在产量改进的选择中，株行世代直接选择的实际效果较差。
Yet in the selection for yield improvement, the practical effect of direct yield selection in plant-to-row generation was not satisfactory.
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