In a reference counting system, however, neither of the objects can be destroyed, because the reference count never reaches zero.
而在引用计数系统，这两个对象都不能被销毁，原因是引用计数永远不能为零。
Right. N is over here for counting from zero.
对的，从0开始计数，N到了这边。
When zero is reached, the timer starts counting up to show time elapsed since alarming.
在达到零秒时，计时器便开式正数计时来显示从报警后开始的时间。
One time he started counting backwards. he said something like '38', and i didn't get it, then he said '36'…wait a minute, wait a minute, he goin' backwards and when he gets to zero, he got 40!
有一次他（乔丹）开场得分后数道“38”，我没懂什么意思。然后他数道“36”……等等，他是在倒数。当他数到零时，他已经得了40分了。
This method enhanced the measuring accuracy by using the methods of wave head counting and zero-cross detection, and it implemented 3-d positioning with triangle square wave.
该定位系统采用波头计数与零交叉点检测的方法来提高超声测距精度，并通过三角形方法来实现三维定位。
After counting the crossings, if the result is zero then the point is outside the path.
计算交点的数目后，如果结果为零，则说明该点位于路径外部。
After counting the crossings, if the result is zero then the point is outside the path.
计算交点的数目后，如果结果为零，则说明该点位于路径外部。
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