There is little or no experimental evidence . 有关的实验证据其实很少或者近于乌有。
We have direct experimental evidence for the quantization of energy . 我们已经有了关于能量量子化的直接实验证据。
Nuclear physics has provided extensive experimental support for the mass-energy equivalence . 原子核物理学已经为质能等效性提供了广泛的实验证据。
Two hundred years would lapse before conclusive experimental evidence established the "particulate" nature of matter . 又过了两百年,才有肯定的实验证据确认物质的“粒子性”本质。
Although the hard evidence of experiment can destroy a theory, no amount of experimental verification can "prove" a theory . 虽然实验的铁证可以毁掉一种理论,但实验证据再多也“证明”不了一个理论。