elongation of valve stem

例句：

1. 1. The length of the rope was measured to be 50 meters.
   这根绳子的长度被测量为50米。
2. 2. The scientist discovered a new species of plant that grows much longer than its predecessors.
   科学家发现了一种比前代植物生长更长的新物种。
3. 3. The car's wheelbase is elongated for better handling and stability.
   汽车的轴距被加长，以获得更好的操控性和稳定性。