节省: saving, to save, to use sparingly, to cut down on...
沿海: coastal...
手动: manual, manually operated, manual gear-change...
打官司: to file a lawsuit, to sue, to dispute...
完备: faultless, complete, perfect, to leave nothing to be desired...
打交道: to come into contact with, to have dealings...
黑: black, dark, sinister, secret, shady, illegal, to hide (sth) away, to vilify, (loanword) to hack (computing)...
能否: whether or not, can it or can't it, is it possible?...
大致: more or less, roughly, approximately...