The crisis caused public outrage because it is thought the chemical was added deliberately to allow substandard milk to pass nutrition tests and because of the cover-up.

这场危机激起了民愤，不仅是因为这些化学品是被蓄意添加以提高蛋白质含量，更是因为那些奶粉厂家对这个事实的掩盖。