submarine navigation

• 水下航行

submarine navigation的用法和样例：

例句

1. Thermocline is important for submarine in underwater navigation and action.
   温跃层对于潜艇的水下航行和战斗具有十分重要的意义。
2. A diesel submarine is able to cruise under water for a short period of time, but a nuclear one is able to cruise under water much longer.
   柴油潜艇在水下只能航行非常短的时间，而核潜艇在水下航行的时间要长得多。