The answer is zero.

答案是零。

youdao

If a home generates more power than it uses, the bill is zero.

如果一个家庭产生的电力比它所使用的要多，那么电费账单就是零。

youdao

One minus one is zero.

一减一等于零。

《柯林斯英汉双解大词典》

And there is zero research that says closing the school necessarily helps those children."

VOA: special.2010.03.18

Well, the energy at infinity is zero -K and the energy in the ground state is minus K.

无限远处的能量值为,而基态能量值为。

麻省理工公开课 - 固态化学导论课程节选

So, when the voltage difference between the plates is zero, or when we just don't have the plates there at all, the cathode rays are not bent, they just go right in a straight line, and they can be detected on this screen.

拐弯来测试它们是否带电,当两板之间电压为零，或者根本就,没有这两个板时，阴极射线是一条直线,它可以在屏幕上。

麻省理工公开课 - 化学原理课程节选

Therefore, the optimum asset allocation to gold over long periods of time is zero.

FORBES: The Optimum Asset Allocation to Gold Is Always Zero

Without agreement on a revenue number, there is zero chance of a successful tax reform.

FORBES: A Path To Tax Reform In Four Simple Steps

If you donate time to a worthy cause, there's yet another rule-your "cost" is zero.

FORBES: Taxing Matters: Going, going, deducted!