crane radius

例句：

1. 1.The crane's radius is the distance between its center of gravity and its base point.
   起重机的半径是其重心与基点之间的距离。
2. 2. The crane's radius affects its lifting capacity.
   起重机的半径影响其起重能力。
3. 3. The crane's radius is critical for safe operation.
   起重机的半径对于安全操作至关重要。