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。
A colony of bees had turned the engine into a hive and it was totally preserved in beeswax!
一群蜜蜂把发动机当作了蜂房,发动机在蜂蜡中被完整地保存了下来。