a problem in space造句

• Salt is another bugaboo . " nasa is in a dilemma about salt , " says hunter . it makes food taste good , but too much can speed bone loss , which is already a problem in space
  另外盐也是一个难题，涵特说盐让太空总署左右为难，因为盐可以增加食物的味道，可是如果吃太多则会加速骨质的流失，而骨质流失原本就已经是太空旅行的一大问题。