As mentioned early in this article, lists are useful structures, and the kernel provides an efficient implementation for generic use.
如本文此前所述，列表是有用的结构，内核提供了一个有效的通用使用实现。
This is a useful theorem for the existence of efficient estimate can efficiently be discussed by using the theorem, and an efficient estimate can be obtained immediately when it comes into existence.
它是有效地讨论有效估计的存在性以及当有效估计存在时立即得到这个有效估计的一个有用的定理。
Conclusion pneumatic lithotripsy by rigid transurethral ureteroscopy is an useful, safe and efficient technique in the treatment of calculi in the mid and distal ureter.
结论输尿管镜直视下气压弹道碎石术治疗输尿管结石，碎石确切、安全、组织损伤小，清除彻底，并发症少，可视为输尿管中段和下段结石的首选治疗方法。
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