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。
In 1928 some porpoises were photographer working like beavers to push ashore a waterlogged mattress.
1928年,有人拍摄到了海豚像海狸一样把浸透水的床垫推上岸的情景。