We ask, is this positive, negative, or zero.

这是正的负的还是零。

youdao

But, if a field is fairly simple, you should be able to get some general feeling for whether your answer should be positive, negative or zero just by thinking about which way is my flow going.

但如果流速场很简单的话，大家理应有一种直觉，可以感受出来，结果应该为正为负，还是为零。

youdao

No positive number, no negative number. That's a zero.

没有正数，没有负数，只是个零。

youdao

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

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This figure also languished close of zero and even turned negative in 1998-2001, but since then it has turned strongly positive for Japan.

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