translation.en: And it opens and closes the shutter so the amount of light coming out of the bottom -- which is made by the bacterium -- exactly matches how much light hits the squid's back, so the squid doesn't make a shadow.
translation.zh: 然后调节它的活叶瓣。 使从它腹部所放出的光 细菌产生的光 完全符合照射在乌贼背上的光强度 因此这乌贼就不会产生任何影子。