Some simple things that people can do to protect themselves are, while it sucks staying inside, turning off your AC.
人们可以做一些简单的事情来保护自己，当在家中感到不适时，可以关掉空调。
玩转物理学
Turn density equals number of turns inside the Amperian rectangle divided by the length of the Amperian rectangle.
匝密度等于安培矩形内的匝数除以安培矩形的长度。
英语百科
Glossary of dance moves
（重定向自Inside turn）
Ball change
Ball change is a dance move that consists of two steps: or a partial weight transfer on the ball of a foot behind or by the other foot, followed by a step on the other foot. This action has a syncopated feeling and counted &1, or &2, or a1, or a2, etc., i.e., the "ball" step splits off the end of a beat. It is used, e.g., in the kick ball change.