plane triangle

例句：

1. 1. The pilot was able to land the plane safely.
   飞行员成功地将飞机安全降落。
2. 2. He spent hours studying the plans for building a new plane.
   他花了很多时间研究建造新飞机的计划。
3. 3. The plane's engine sputtered and died.
   飞机的引擎突然熄火了。