事实上，它通常是一个复数的形式，包括普通数字的实数部分和需要乘以负一的平方根的虚部。

In fact, it can generally be a complex number with both a "real" part that's an ordinary number and an "imaginary" part that's multiplied by the square root of one.

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本例是一个实部为 3.0 和虚部为 1.2 的复数。

This example is a complex number that has a real component of 3.0 and an imaginary component of 1.2.

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