In addition to containing high Numbers of complex proteins that promote healthy sleep sweet potatoes also have large amounts of potassium.
甘薯除了含有大量的复合蛋白质可以促进健康睡眠之外，也含有大量的钾。
We derive the addition formulas for sine and cosine from the arithmetic of complex numbers.
复数算术推导了正弦，余弦的加法公式。
We derive the addition formulas for sine and cosine from the arithmetic of complex numbers.
复数算术推导了正弦，余弦的加法公式。
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