The melamine is truly one kind can the pathogenesis chemistry supplement, but this was not equal to after all said it is one toxicoid.

三确实是一种能够致病的化学添加物，但这毕竟不等于说它本身是一种有毒化学物质。

The scale up test for the synthesis of melamine melocol resin was accomplished on the basis of the technological conditions adopted in the former pilot test.

以密-脲甲醛树脂合成的小试工艺条件,完成了放大试验过程的工艺研究。