critical wind speed

例句：

1. 1. The aircraft's criticalwind speed is 200 knots.
   飞机的临界风速是200节。
2. 2. The ship's criticalwind speed is 18 knots.
   船的临界风速是18节。
3. 3. The wind speed must be below thecritical wind speed for the structure to remainstable.
   风速必须低于临界风速，结构才能保持稳定。