例句與造句

1. River-class frigates were the first Royal Canadian Navy warships to carry the 147B Sword horizontal fan echo sonar transmitter in addition to the irregular ASDIC . This allowed the ship to maintain contact with targets even while firing unless a target was struck.
2. River-class frigates were the first Royal Canadian Navy warships to carry the 147B Sword horizontal fan echo sonar transmitter in addition to the irregular ASDIC . This allowed the ship to maintain contact with targets even while firing, unless a target was struck.
3. It's difficult to find sonar transmitter in a sentence. 用sonar transmitter造句挺難的