从中心切除一个圆形的正统山形墙是什么？

What was this classical pediment with a circle shape cut out of the centre?

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可能存在一种避免细胞吞噬过量的方法——切除纳米管的圆形端部。

And there may be a way to keep cells from biting off more than they can swallow-snip off the nanotubes' rounded tips.

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目的：为头皮肿瘤、瘢痕等切除后形成的近似圆形的头皮缺损，寻求一种较简便安全、损伤小、无秃发的即刻修复方法。

Objective To seek a simple, safe, less trauma, imbaldness and effective method for the instant repair of scalp defects either after the excision of a head tumor, or cicatricial alopecia areata.

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