natural-surfaced runway

例句：

1. 1. The natural-surfaced runway is a crucial part of the airport's operations.
   天然表面跑道是机场运营的重要组成部分。
2. 2. The aircraft landed on the natural-surfaced runway, which was smooth and well-maintained.
   飞机降落在了天然表面跑道上，跑道非常平滑且维护得很好。
3. 3.The flight crew had to make an emergency landing on the natural-surfaced runway due to bad weather conditions.
   由于恶劣的天气条件，飞行机组不得不在天然表面跑道上紧急着陆。