<prompt> Translate the following text to EnglishWauzaji wa Marekani walijua China ingeleta viwanda vipya, vyenye ufanisi zaidi, lakini hawakutegemea nchi hiyo kuendelea kuendesha viwanda vyake vidogo, visivyo na ufanisi.  <response>: U.S. producers knew China would bring on the new, more-efficient plants, but they did not expect that country to continue running its smaller, less-efficient ones. 