In fact, the spring of the absorber is not massless.
实际上，避振器的弹簧具有质量。

So you have three point masses, and they are connected with massless rods.
你们有个三角物体，它们由无质量棒相接。

A discovery that neutrinos, virtually massless particles, convert into other forms known as muon and tau before they leave the sun, solving a40 yearold mystery.
发现中微子离开太阳之前可转化介子，解开了一个40年的谜。

A discovery that neutrinos, virtually massless particles, convert into other forms known as muon and tau before they leave the sun, solving a 40yearold mystery.
发现中微子在离开太阳之前可转化介子，解开了一个40年的谜。

massless neutrino.
无质量中微子

Lets call it a massless spring.
我们叫它无质量弹簧。

It obeys Hooke's Law, and it is also nearly massless.
它遵循胡克定律，几乎是无质量的。