articulated freight car

例句：

1. 1. The new design ofthe car is articulated to improvefuel efficiency.
   这款车的新款设计旨在提高燃油效率。
2. 2. The robot has an articulated arm that can move independently.
   这个机器人有一个可以独立移动的关节手臂。
3. 3. Theteam was able to articulate theirideas clearly and effectively.
   团队能够清晰地有效地表达他们的想法。