Human being center of mass rest between their legs, your hips.

人的重心在两腿之间，臀部之间。

It sits at an angle, though, with one end pointing inferiorly toward the left hip, and the other toward the right shoulder. So most of its mass rests just a little bit left of the midsternal line.

然而，它以一个角度坐着，一端向下指向左臀部，另一端指向右肩。所以它的大部分质量就在胸骨中线的左边一点。

The process that produces this x-ray radiation in the accretion disk is one of the  most efficient energy producing processes known where the spiralling material has up to 40% of its  rest mass converted into energy.

在吸积盘中产生这种 X 射线的过程是已知的最有效的能量产生过程之一，其中螺旋物质的静止质量有高达 40% 转化为能量。