It was so dark that they couldn't see one another at all and it made no difference whether you keptyoureyes shut or open.
天空没有星星,四下一团漆黑,谁也看不见谁,眼睛睁开和闭上都是一样。
2
If light could be kept out from where you are so that there would be no light from the book to reflect, then you could not see the book even with youreyes wide open.