Within great latitudes, the artificial ecosystem of Bio2 ran its own course, but when it veered toward a runaway state, or stalled, the biospherians nudged it.

• 生物圈二号这个人工生态系统极大限度内循自己的线路运行，但是当它滑向失控的状态，或者停止运转时，生物圈人可助予一臂之力。