You, meanwhile, will be the only one who ever resets the left lever from position B to position A.

而你，才是唯一重置左控制杆的人，从位置 B 重置到 A。

Everyone needs to pull the left lever down exactly once, and you're the only one to pull it back up.

每个人只需将左控制杆拉到 B 位置1次，而你是唯一能将位置重置回 A 的人。

Your plan is simple: you'll use the left lever to count visits, and the right lever will have no meaning, so there's no harm in moving it up or down.

你将用左控制杆来计算访问次数，而右控制杆没有任何用处，所以，移动右控制杆位置无所谓。

If the robot appears with the left lever already pulled down, or if an individual has previously pulled the left lever down at any point in the past, then they should move the right lever.

若机器人出现时左控制杆已拉到 B，或某人已在先前某时把左控制杆拉到 B 位置，这时，他们应该移动右控制杆的位置。