“反号”是天文学专有名词。来自中国天文学名词审定委员会审定发布的天文学专有名词中文译名，词条译名和中英文解释数据版权由天文学名词委所有。
此线的东北与西南，地磁湾扰、磁暴急始等短周期事件垂直分量的变化△z 呈现反号。
Z (Changes in the Vertical field) for the sudden storm commencements and geomagnetic bays to the northeast and southwest of this line appear opposite in signs.
如果愿意，可以使用反撇号进行命令替换。
If you prefer, you can use the back-ticks for command substitution. It achieves the same result.
当然，这三种操作符(单引号、双引号和反撇号)都有合法的用途，但是与英语中的例外一样，记住和掌握这些细微差异很令人头疼。
Certainly, all three operators-the single, double, and back quotation marks-serve a valid purpose, but like exceptions in English, memorizing and mastering the variations can be maddening.
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