gear

The mountain bike has 21 gears to help the rider climb steep hills easily.

(Chinese) 这辆山地车有21个档位，帮助骑手轻松爬上陡坡。

If the gears in the clock are rusty, the hands will not move accurately.

(Chinese) 如果时钟里的齿轮生锈了，指针就不会准确移动。

Make sure you pack all your hiking gear, including sturdy boots and a rain jacket.

(Chinese) 确保带齐所有的远足装备，包括结实的靴子和雨衣。

The soldiers were carrying heavy combat gear during the training exercise.

(Chinese) 士兵们在训练演习中携带者沉重的战斗装备。