潜水艇的例句（潜水艇在句子中的用法）

• The submarine signaled for help. 潜水艇发出求救的信号。
• We picked up two submarines on sonar. 我们用声呐系统观察到两条潜水艇.
• The submarine had had time to submerge before the warship could approach. 潜水艇没等军舰靠近就及时潜入水下了。
• ...the submarine's propulsion system. 潜水艇的推进系统