elongating

例句：

1. 1. The ropeis elongating as it stretchesout.
   绳子在拉伸时正在变长。
2. 2.The car's wheelbase is elongating as it gets longer.
   随着汽车轴距的增加，它正在变长。
3. 3. Thetree is elongating its branches toreach the sun.
   这棵树正在伸长其树枝以到达阳光。