一般推荐定期结肠镜检查，但常规结肠镜检出肿瘤困难。

Colonoscopic surveillance is advised, but the detection of neoplasia by conventional colonoscopy is difficult.

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编辑是一种零散但常规的活动，对于壮大和维护社区的参与十分关键。

Editing is a sporadic but regular activity, essential for growing community and maintaining participation.

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但常规性的通气支持对有些病人的作用不大，使治疗的复杂性进一步加大。

However, some patients do not respond well to conventional ventilatory support, further complicating the treatment.

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So, essentially when we're talking about these equations up here, all we're doing is talking about the regular Rydberg formulas, but instead we could go back and re-derive the equation for any one electron atom, which would just mean that we put that z squared term in the front.

所以本质上,当我们讨论，这些问题时，我们说的是常规的，Rydberg公式，但对任何其他单电子原子，我们不用,从头再推到，而是仅仅把，z平方项放在前面。

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