An airworthy helicopter...

If he is inclined to take a nap after dinner, ' his stomak to digest,' kerchief and comb, pillow and headsheet are to be got ready, and he is not to be allowed to sleep too long.

The moving qi between the kidneys starts at qi hai; the triple warmer meridian receives it and sends it up to the head and into the brain.

Dead zones are hypoxic areas in the world's oceans and large lakes.