How to use in-sentence of “let in”:
+ A group of scientists make a portal to another dimension, and accidentally let in many alien monsters that start killing everyone.
+ In many cameras, the size of the aperture can be changed to let in more light or less light.
+ This might suggest the “light of wisdom” or “to let in light”.
+ A high number means that the aperture is small, and does not let in as much light.
+ They have holes in the top of them so your feet can let in air.
+ These large entrances let in all the crowds on special Holy Days.
