由于地方冲突的增加显着水浅的地方-水的音响学问题已经在重要性浮现美国海军可能哪里慢地遇到， 柴油接近地用潜水艇攻击支撑。
The shallow-water acoustics problem has risen in importance due to the increased salience of regional conflicts where the US Navy may to encounter slow, diesel submarines close to shore.
那艘潜水艇突然浮出水面，对着这条船闪着信号灯，表明攻击在即。
The submarine surfaced suddenly and flashed a signal lamp at the ship indicating an imminent attack.
被护送的船队受到了潜水艇的攻击。
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