This produces a round cross section which reflects light to give the improvement in luster.

使纤维的截面呈圆形，这有助于对光的反射作用，因此改善了光泽。

youdao

So, we are starting to have a slightly better idea but we still don't know whether the cross section of this thing might be round, square, something else. So, it wants more confirmation.

那么现在我们对原来的图像有了进一步的认识但是我们仍然，不知道它的横截面是否是圆，正方形或者其他的样子，因此我们需要进一步的确认。

youdao

I used a similar method to create material inserts - strings for back and for seat of the chair, with the difference that instead of a round cross-section strings here strings are flat.

我用同样的方式创建了椅子后背和座位的填充材料，不同之处是平滑的线代替了圆线。

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