He glanced at the envelope and recognized Xiao Lang 's hand writing.
他看了看信封，认出是小梁的笔迹。
"I had now got hold of Bessie" s hand, and she did not snatch it from me.
这时，我拉住了贝茜的手，而她并没有抽回去。
If you know the precise direction and velocity at which a shot put leaves an Olympic athlete 's hand, you can use a linear equation to accurately forecast how far it will fly.
如果你知道了铅球的精确方向以及它在离开奥运会运动员的手时速度的大小，那么你就可以用一个线性方程去精确地预测它能飞多远。
If you know the precise direction and velocity at which a shot put leaves an Olympic athlete 's hand, you can use a linear equation to accurately forecast how far it will fly.
如果你知道了铅球的精确方向以及它在离开奥运会运动员的手时速度的大小，那么你就可以用一个线性方程去精确地预测它能飞多远。
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