spiral dive

• 螺旋俯冲

spiral dive的用法和样例：

例句

1. This should produce the longest dive.
   这将产生长距离的俯冲。
2. If you can't see the bottom, jump in, don't dive.
   如果水深不见底，跳进去时脚先落水，不要俯冲下水。