The pleasure dome refers to Coleridge's poem Kubla Khan. As he says, it is a beautiful place that is surrounded by rough landscape. Imagine an oasis in the middle of a desert, except the oasis is more beautiful and the desert is much worse. It is found in the mystical land of Xanadu and is the home-place of Kubla Khan.
lenses produce their image due to reflection of light
Qì<span> or </span>ch'i<span> yup
yup yup
yup</span>
