英语语法分析

Holmium, Holmium Metal, Metal Holmium.

钬，金属钬，钬金属。

Objective To investigate the therapeutic effect of holmium-laser on ureteroceles.

目的探讨钬激光治疗输尿管口囊肿的疗效。

Conclusions: Transureteroscopic holmium laser lithotripsy is an effective and safe method for ureteral calculi.

结论经输尿管镜钬激光碎石是一种有效、全的腔内碎石方法。