凹 ao ˉ

(Concave, Dented, Depression, Hollow, Indentation)

Concave, Dented, Depression, Indentation, Hollow

透鏡 touˋ jingˋ

(Lens)

Lens

凹

Concave, Dented, Depression, Hollow, Indentation

Concave, Dented, Depression, Indentation, Hollow

透

Appear, Complete, Let out, Pass through, Penetrate, Pierce, Show, Thorough

Pierce, Penetrate, Pass through, Let Out, Appear, Show, Thorough, Complete

鏡

Eyepiece, Glasses, Lens, Lenses, Mirror, Reflector, Refractor, Scope, Spectacles

Lens, Lenses, Spectacles, Glasses, Scope, Eyepiece, Mirror, Reflector, Refractor