gear bank

例句：

1. 1. The gear bank is a reserve of spare parts for the car's engine.
   齿轮储备是汽车引擎的备用零件储备。
2. 2.The company has built up a significant gear bank to support its operations.
   该公司已建立了一个相当大的齿轮储备来支持其运营。
3. 3.The gear bank was used to store the old cars, which were then sold at a discount.
   齿轮储备被用来存储旧车，然后以折扣价出售。