他突然笑了出来，露出了刚箍过的牙。He suddenly smiled, revealing teeth that had recently been capped.用铁箍箍紧的桶a barrel bound with iron hoops木盆都用铁箍箍紧.The wooden tub is fitted with the iron hoop....
The isocyanates can be obtained by the fluorination of nitrogenous cylic or acyclic molecules.异氰酸酯可由含氯的环(或非环)状分子氟化而得.The inheritance hierarchy is actually a directed acyclic graph.注意:继承实际上是开放的层次关系.The Acyclic Dependencie...