2. The tooth dare be not touched too cool too hot too
acerbity too hot too exciting thing, how to do?
牙齿不敢碰太凉太热太酸太辣太刺激的东西了,怎么办?
3. Still iron is made, iron is accumulated very easily to corrode by
acerbity bedding face, lift coating thereby.
还有铁制造的,铁很轻易被酸大面积腐蚀,从而把涂层掀起。