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 a nation is essentially disunited, it is left to the government to hold it together.
如果一个国家实际上处于分裂状态,使之联合起来就是政府的事了。