automatically adjusting counter weight

例句：

1. 1. The machine automatically adjusts the counter weight to maintain balance.
   这台机器能自动调整配重以保持平衡。
2. 2. The engineer adjusted the counter weight to improve efficiency.
   工程师调整了配重以提高效率。
3. 3. The car's counter weight was adjusted to reduce its center of gravity.
   汽车的配重被调整以降低其重心。