John's church seems to be a very sectarian group, why does he talk so much about dark and light?

约翰的教会似乎是一个非常教派主义的团体，他为什么那么频繁地讲到黑暗和光明？

youdao

One group was totally blind. The other group was legally blind but could still make out light and dark.

研究人员拿两组盲人偏头痛者作对比，一组完全失明，另一组法定失明，但还分辨得出光和暗。

youdao

They all start like traditional academic advertisements - but then take a sudden dark twist including one in which Ridgewell has a shoot-out with a group of zombies.

这些广告的开头跟传统学校广告毫无二致，但是都会突然来个转变，其中一个广告中里奇·维尔跟一群僵尸在打斗。

youdao

The Andromeda Galaxy is big enough and near enough to be seen by the unaided eye in the star group Andromeda on a dark night.

VOA: special.2009.01.20

Winblad remembers Gates disappearing on a dark beach after his group had been given the word sea, and then slowly emerging from the mist singing a high-pitched solo of Puff, the Magic Dragon.

CNN: In Search Of The Real Bill Gates

Petstore.com is the group's dark horse.

FORBES: Rabid Redux

The 1955 exhibition "Man, Machine and Motion, " organized by Richard Hamilton, a member of Britain's Independent Group, is both dark and exuberant.

WSJ: Ghosts in the Machine | New Museum | Beyond Human | By Kristin M. Jones