bad material

基本解釋

There are plenty of good and bad learning materials on the Internet, please exercise caution when using them.
網(wǎng)上有好的，也有壞的學(xué)習(xí)資料，各位小心。
However, in domestic market, there are many factories use bad chemical materials to produce some poor-quality shampoo.
但是，在國內(nèi)市場上，卻有很多不法商家使用劣質(zhì)化學(xué)原料來配制洗發(fā)水。
Rejecting online bad reading materials is the responsibility of the whole society.
觝制網(wǎng)上不良讀物是全社會(huì)的責(zé)任。
kns50.chkd.cnki.net

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