a lot / a majority

largely; mostly

consist of; be composed of / reach; be concluded / be buildable; be constructible

(of size or amount) small, little, tiny / (of age) young, little

compound eye

an insect (arthropod of class Insecta)

lens (object focusing or defocusing the light passing through it)

zoom lens (lens whose focal length can be rapidly changed)

Alternative spelling of フレネルレンズ (“Fresnel lens”)

a Fresnel lens