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。
If you want to be thinner and healthier, you have to eat less food--and you also have to take more exercise.
“如果你想瘦些、健康些,你就得少吃一点--你还得多运动。”