在火星上，直径小于5公里的陨石坑相对较少。

On Mars, there are relatively few craters less than 5 kilometers in diameter.

youdao

在树根处砍一个缺口，缺口的深度应该是树木直径的80%，其角度大约为70度。

Cut a 70-degree notch into the tree with a length of 80 percent of the trunk’s diameter.

youdao

在清晰的风暴中心周围环绕着纹理粗糙的云层，风眼的直径大约有25千米。

Rough-textured clouds surround the storm's distinct eye, which has a diameter of roughly 25 kilometers.

youdao

Because of that you can't count on molecules moving rapidly over the size of a cell that's ten to 30 Microns in diameter.

因此不要对生物大分子能在,直径十到三十微米的,细胞里高速穿行抱有任何指望

耶鲁公开课 - 生物医学工程探索课程节选

It looks a little something like that, and the screen doesn't quite do it justice here, Z but there's two alphabets; A through Z, and then A through Z, -- but the inner A through Z is on a small -- it has a smaller diameter; so it's a ring of letters.

它看起就像那样的东西，那个画面做的不是这么公正，这里有两个字母表，A到Z，然后A到，但是戒指内部的A到Z是在一个小直径的上面-,它有一个小的直径，所以它是一个有字母的戒指。

哈佛公开课 - 计算机科学课程节选