A second of time, for instance, is now defined in terms of an electron transition of the cesium atom. And the meter is tied to the speed of light.

比如说，秒就是根据铯原子内部的电子跃迁时间来下的定义，而米的定义则和光速有关。

youdao

The Buddha's "first atoms" are, therefore, 4 centimeters divided by 7 ten times, which is 0.04 meter x 7 to the minus 10 or 0.00000000001416 meter, which is more or less the size of a carbon atom.

佛陀“最初原子”等于是四厘米除以七的十次方，也就是0.04米乘以7的负10次方或者0.00000000001416米，差不多就是一个碳原子的大小。

youdao

Their standard model treats the universe as though its density did not vary from place to place but had a uniform, average value of one atom per cubic meter.

标准模型将宇宙视为一个均匀结构，密度不会随著空间位置而变化，每立方公尺平均有一个原子。

youdao

The nebulous field of nanotechnology, freighted with as much hype as legitimate promise, boils down to the process of manipulating matter on a molecular scale (a nanometer is one billionth of a meter, about ten times the width of a hydrogen atom).

FORBES: The science of small