1. At the Indian Ocean, some of the cold and salty water from Atlantic -- drawn by the flow of warmer and fresher upper ocean water from the tropical Pacific -- causes a vertical exchange of dense, sinking water with lighter water below. It is known as overturning.
南极底层水」（Antarctic Bottom Water，英文缩写：AABW）在
2. The nature of somnolence is also a kind of channels disease caused by abnormal wei-energy movement. This disease can be attributed to abnormality occurred in physical fitness, upper warmer, spleen and kidneys (differentiation of somnolence related contents attached).
嗜睡的本质亦当属卫气运行异常所致的经脉病，其病因可责之于体质、上焦以及脾肾的异常（附：嗜睡相关内容之辨析）。
3. They have more bottom end, a warmer, mellower mid and upper mid-range, and often more top octave.
低端丰满，中频又温又纯，更经常在极高频段更出彩。