于是我找了把更锋利的刀顺向纵切。

So I use a sharper knife and make a smooth and straight cut.

youdao

管腔纵切面：单层立方上皮衬于管腔内。一些立方细胞之间的边界相当清晰明显。

Simple cuboidal epithelium lining a tubule (longitudinal cut). Some of the cell boundaries between "blocks" or "cubes" here are quite distinct.

youdao

大峡谷其实就是一系列陡峭绵长的岩石纵切面。

The Grand Canyon is a series of deep long cuts in rock.

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