dozen常见用法（1）基数词/many/several+ dozen+复数名词；（2）基数词+dozen+of sb或基数词+dozen+of these/those/one’s+复数名词；（3）dozens of +复数名词。例句Tommy ate cookies by the dozen。
dozen意为“十二”，当dozen与基数词或many,several等连用时，不加“-s”，所修饰的名词前常省去of。
水利万物而不争,
而万物莫能与之争。
