Malfunction of the metallic stent can be caused by encrustation of crystals , bacterial sludge , bile salts , and tumor compression or tumor ingrowth 金属支架的功能障碍可以由胆管内的结晶凝块，细菌性污泥，胆盐，及肿瘤压迫或肿瘤直接侵入支架。
2.
The experiment result shows that , with the increase of blade elevation angle , so2 removal efficiency and the operation stability will be descended , the amount of encrustation will be increased 结果表明，一般情况下，叶片仰角增大，脱硫率有所下降，塔的运行稳定性有所下降，结垢有所增加。
3.
The encrustation is powdery when scratched - although not in all cases , ancient encrustation on pottery flakes and chips but combined with the other characteristics it becomes blatantly obvious 表皮在搽拭时会掉粉尘（灰） ，尽管有少部分不会发生这种情况，这和彩陶表皮的特征是完全不一样的，所以一眼就能识别。
4.
The encrustations of tracking and sensing devices cybernauts now wear will be integrated into clothing or replaced by video cameras and other sensors that monitor movements and gestures from a distance 赛百遨游者目前所配戴的追踪感应器的外壳将被制作进衣服中，或被摄相机和其它能从远距离监控运动和手势的感应器取代。
