This condition is called postural or orthostatic hypotension and can leave a person feeling dizzy and light-headed, and it could even cause a person to faint.
这种情况称为姿势性或体位性低血压,可能会使人感到眩晕,头晕目眩,甚至晕倒。
英语百科
Standing
(重定向自Orthostatic)
Standing, also referred to as orthostasis, is a human position in which the body is held in an upright ("orthostatic") position and supported only by the feet.
Although seemingly static,the body rocks slightly back and forth from the ankle in the sagittal plane. The sway of quiet standing is often likened to the motion of an inverted pendulum.