diesel-electric locomotive

例句：

1. 1. The diesel-electric locomotive is an important part of the railway system.
   柴油电力机车是铁路系统的重要组成部分。
2. 2. The diesel-electric locomotive has been used in many countries for decades.
   柴油电力机车已经被许多国家使用了几十年。
3. 3. The diesel-electric locomotive is a reliable and efficient transportation tool.
   柴油电力机车是一种可靠且高效的运输工具。