low clearance的用法和樣例：
例句
- A jet plane shrieked low overhead.
飛機在頭頂上方尖聲低空飛行。 - They were flying at a low altitude.
他們在做低空飛行。 - Therefore, the polar stratospheric height will be lower, because the polar surface temperature is relatively low.
所以，極地的平流層會于較低高度出現，因為極地的地面氣溫相對較低。 - The radar system allows the aircraft to fly at low altitudes and therefore reach the drop zone undetected.
雷達系統允許飛機在較低高度飛行，然后到達未被發現的空投地區。
