undercarriage springing

例句：

1. 1. The pilotwas killed when the plane's undercarriage failed to deploy properly.
   飞行员在飞机的机翼没有正确展开时被炸死。
2. 2. Theengineer inspected the undercarriage for any signsof wear and tear.
   工程师检查了机翼，看是否有磨损的迹象。
3. 3. Theaircraft's undercarriage wasdesigned to provide stability during takeoff.
   飞机的机翼设计用来在起飞时提供稳定性。