dip-strike symbol

例句：

1. 1. The dip-strike symbol is used to indicate the location of a submarine in the ocean.
   潜水打击符号用于指示潜艇在海洋中的位置。
2. 2.The dip-strike symbol is also used to denote the presence of a submarine at a given depth.
   潜水打击符号还用于表示潜艇在某深度的存在。
3. 3.The dip-strike symbol is often found on the sides of ships and aircraft, indicating the location of the submarine or aircraft.
   潜水打击符号通常出现在船只和飞机的侧面，用以标示潜艇或飞机的位置。