principal mechanical components

例句：

1. 1. The new carhas a powerful engine and excellent performance, which is mainly due to its principal mechanical components.
   这辆新车拥有强劲的发动机和出色的性能，这主要归功于其主要的机械部件。
2. 2. The construction of the bridge was made possible by the careful selection of its principal mechanical components.
   桥梁的建设得益于对其主要机械部件的精心选择。
3. 3. The company's success can be attributed to its ability to maintain its principal mechanical components in top condition.
   该公司的成功可以归因于其能够保持其主要机械部件处于最佳状态的能力。