When the product of value and weight is positive, it contributes to pushing the sum above zero.

当值与权重的乘积是正的时，它有助于促使和大于0。

youdao

Because the mind is like a zero-sum game. It's either positive or negative.

因为心就像个“零和游戏”，它不是善的，就是不善的。

youdao

First of all, happiness is a positive sum game-- it's not a zero sum game.

首先，快乐是正和游戏-,不是零和游戏。

哈佛公开课 - 幸福课课程节选

The key work variable is zero-sum vs. non-zero sum (both negative-sum and positive-sum).

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This realization turns zero-sum games into positive-sum behavior.

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This zero-sum mentality ignores the positive dynamism that comes from accountability to parents and teachers.

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