Instead of wrecking the valley, the waters are put to use making electricity.現(xiàn)在河水不但不在流域內(nèi)肆瘧,反而被人們用來(lái)生產(chǎn)電力.All this experience they had now put to use with success.這一切經(jīng)驗(yàn),他們現(xiàn)在都成功地加以利用了.If they're wise, they can put to us...