Of all speech impediments stammering is probably the most embarrassing.在所有言语障碍中，口吃可能是最令人尴尬的。There are no legal impediments to their appealing against the decision.他们对这一决定提出上诉不会遇到法律障碍.The agreement is designed to remove i...
A new chalcogenide glass system containing higher content of alkali metal ions was developed.开发了有高含量碱金属离子的新型硫化物玻璃.Using such methods a conductive layer can be formed on the doped chalcogenide layer in situ.利用这种方法,可在该掺杂后的...