It's a plot of intensity of light over time. It is a gamma-ray light curve.

这是随时间变化的光强度图。这是一条伽马射线光变曲线。

So it may be a sort of sweet spot in the intensity of light, the illuminance.

所以它可能是光强度（照度）中的一种最佳点。

And if we think about the amplitude of light, our brain perceives that as the intensity of light, how bright it is.

如果我们考虑光的振幅，我们的大脑就会将其感知为光的强度，即光的亮度。

Scientists can study these exoplanets by measuring the intensity of light at different wavelengths and turning it into a graphical representation like this Exoplanet spectrum released Tuesday.

科学家们可以通过测量不同波长的光线强度，并将其转化为图表，来研究这些系外行星，比如周二发布的系外行星光谱。

The South American boutu and Chinese beiji, for instance, appear to have very limited vision, and the Indian susus are blind, their eyes reduced to slits that probably allow them to sense only the direction and intensity of light.

例如，南美江豚和中国白鳍豚的视觉似乎非常有限，而印度江豚则完全没有视觉，它们的眼睛已经退化成窄缝，可能只能感知方向和光线强度。