Free arrangement is a very important kind of hyperplane arrangement.自由構形是超平面構形中一類重要的構形.The invention of hyperplane kinescopes is another technical innovation.超平顯像管的發明是又一次技術革新.Then the method to construct the optimal sepa...
Local conditions, especially the presence or absence of oxygen, affect Biodegradability.地方的情況(特別是有氧或無氧)影響著生物降解.Starch has abundant resources , low price and natural biodegradability.淀粉產量豐富, 價格低廉,具有天然的生物降解性.Biodegradabili...