We should teach the young by placing responsibility on them and by trusting them in real endeavors...我们应该通过让年轻人承担责任、令他们进行真正的尝试来教育他们。No longer trammel by his responsibility as chairman, he can say what he wish.他不当董事长就不受职务...
manganese peroxide二氧化锰The sample was molten and decomposed with sodium peroxide , leached and acidified hot water and - volumed.试样以过氧化钠熔融分解,热水浸取、酸化,定容.Explain why barium forms peroxide but beryllium does not.解释为什么钡能形成过氧化...
You can't call a hedgehog cuddly – that's a contradiction in terms!你不能说刺猬逗人喜爱——那个说法,词语自相矛盾.The hedgehog rolled itself up.刺猬把身子蜷缩成一团.A hedgehog rolls itself into a ball when attacked.刺猬一受到攻击就蜷缩成一团.A hedgehog...