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汉语拼音：xiāng fǎn shù

数轴上原点两旁，且与原点距离相等的两点所对应的两个数，互称相反数”。两实数互为相反数的充要条件是它们的和为零。零的相反数仍是零。

• Well, we could use it and then subtract, but I was just going to say that ndS is actually the opposite of this.

  我们可以先用一下，然后加个负号，但是我要说明，ndS正好是这个的相反数。

• Instead of one man building and controlling a large bureaucracy, we have a political party that has been doing it for several decades.

  与一个人建立和控制一个巨大的官僚组织机构相反，数十年来我们是由一个政党来做这件事。

• And, if we change our choice, then of course the flux will become the opposite.

  如果我们换一下方向的话，通量就会变成前面那个答案的相反数。