The ulcer base at the left shows loss of overlying squamous epithelium with only necrotic debris remaining.

左边溃疡基底面缺少鳞状上皮仅存有坏死的碎片。

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The ulcer base at the left shows loss of overlying squamous epithelium with only necrotic debris remaining.

左边溃疡基底面缺少鳞状上皮仅存有坏死的碎片。

youdao