为保证这些新型两栖攻击舰得到有效使用，俄罗斯需要购买或建造一批护航舰只及先进而昂贵的武器和电子系统。

And to make the new ships usable, Russia will need to buy or build flotillas of escort vessels, as well as advanced (and expensive) weapons and electronic systems.

youdao

为保证这些新型两栖攻击舰得到有效使用，俄罗斯需要购买或建造一批护航舰只及先进而昂贵的武器和电子系统。

And to make the new ships usable, Russia will need to buy or build flotillas of escort vessels, as well as advanced (and expensive) weapons and electronic systems.

youdao