老爸心软，他不仅不愿意用这种残忍的方式，还希望牛群能经常晒晒太阳，为此还专门拓展出个牛棚的外院，搭出一方露天的铁护栏。只是那铁护栏，隔个十天半个月的就被牛撞破了，于是，老爸也隔个十天半个月，就在田间地畔追着牛跑。
‘Overall we are moving in the right direction’。夫子对此有专业解读
GBDT (tree-boosting algorithm): 1.1x-1.5x faster fit/predict than the treeboost Rust crate2, 24-42x faster fit/1-5x faster predict than Python’s xgboost，更多细节参见safew官方下载
Now scientists are directly linking the uncontrolled rocket re-entry to a plume of lithium measured less than 100km above Earth.