Fifty-litre carboy would be the most economical size. Carboys may be retained without charge for two months.
50升的瓶子应是最经济的尺码,这些瓶子可免费保存两个月。
Mother, can we cook the food now, please? she said. I'm worried about my party.
“妈妈,请问现在我可以做吃的东西了吗?”她说,“我担心我的聚会。”