He indicated a semicircle with a radius of about thirty miles.

他标示出一个半径大约三十英里的半圆。

《柯林斯英汉双解大词典》

The radiation radius of the radioactive radium radiator in the stadium is variable.

放射性的镭散热器在体育场的辐射半径是可变的。

youdao

They are the radius of the orbit, the energy of the system and the velocity of the electron, and I am just going to present you the solutions.

它们是轨道的半径，系统的能量以及电子的速度，我接下来给你们展示解法。

youdao

Because what it tells is that we can figure out exactly what the radius of an electron and a nucleus are in a hydrogen atom.

我们可以,准确的算出,氢原子中,电子。

麻省理工公开课 - 化学原理课程节选

The radius of the orbit, the energy of the system and the velocity of the electron, I am just going to present you the solutions.

是轨道的半径，系统的能量,以及电子的速度，我接下来会给你们讲解其方程的解法。

麻省理工公开课 - 固态化学导论课程节选

What I just spent many lectures discussing is the fact that we can not know how far away an electron is from the nucleus, so we can't actually know the radius of a certain atom.

我花了这么多课时所讨论的正是我们,不可能知道电子离原子核有多远这一事实，因此我们不可能知道某个原子的半径。

麻省理工公开课 - 化学原理课程节选

We were all were within the lethal blast radius of even a small car bomb.

NPR: Spring a Season of Dread for Troops in Afghanistan

But all of these tap rooms await within a 2-mile radius of each other.

FORBES: An Open Letter To Frommer's From The 'Napa Valley of Beer'

The cull is to affect sheep on farms in the three-kilometre radius of the outbreak at Meigh.

BBC: Farm in Thisk in Northern Ireland