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。