In the Netherlands, the canals of Amsterdam - the so-called "Venice of the north" - gained recognition, after Unesco added the 17th Century canal ring area inside the Singelgracht to its list.

在荷兰，被称作“北方威尼斯”的阿姆斯特丹的运河【译注：辛格尔运河以内的阿姆斯特丹17世纪同心圆型运河区(荷兰)】获得了承认，联合国教科文组织将同心圆型的17世纪辛格尔运河区加入了名录。

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Methods100 molars with vertical fracture were cleaned and fixed by metallic ring. Then root canal treatment (RCT) were completed.

方法100例纵裂磨牙采用先对患牙初步清理复位带环固定根管治疗后全冠修复保存患牙。

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