cooperation and competition can coexist and supplement each other.
问题描述：
cooperation and competition can coexist and supplement each other.
这句话supplement不是名词吗,怎么可以和动词coexist并列这是什么语法?
答
这里supplement是动词,与coexist并列
supplement ['sʌplimənt, 'sʌpləment]
n. 补充,补遗；补充物；附录
vt. 补充,增补
既是动词也是名词
供参考