论证

正如……所说，（intro），什么是什么是什么

Just as *** ，a distinguished political leader，puts it：it is extremely essential to cultivate a good habit of rubbish classification ，and it is ours  responsibility and duty to  publicize its importance,

Just as ***, a distinguished political leader,puts it: the sound environment is  the common treasure  of mankind ,and it is ours responsibility and duty to protect it.