The health advisory limits are in the part per quadrillion.

健康咨询限度是以千万亿分单位。

Part per quadrillion is one thousandth of that.

千万亿分是这个数字千分。

So, you know, we got this back of the eye that responds to 1 ten trillionth of electromagnetic radiation in our world.

因此，我们视网膜仅对世界中电磁辐射总量千万亿分产生反应。

The nucleus of an atom is tiny-only one millionth of a billionth of the full volume of the atom-but fantastically dense, since it contains virtually all the atom's mass.

原子核很——有原子全部容量千万亿分，但密度极大，它实际上构成了原子全部物质。

They are tiny, septillions  of times smaller than an atom – and they explode with the power of a trillion supernovae  in a trillionth of an octillionth of a second.

它们微到比原子千万亿倍——并且在千万亿分秒内爆发出相当于千万亿颗超新星能量。

The laser energy used to move the muon up to that unstable state can be used to calculate the radius of the helium nucleus, which is 1.67824 femtometers—one femtometer being one quadrillionth of a meter.

用于将μ子提升到不稳定状态激光能量可以用来计算氦核半径，其大1.67824飞米——飞米等于千万亿分米。