Fifty-litre carboy would be the most economical size. Carboys may be retained without charge for two months.
50升的瓶子應是最經濟的尺碼,這些瓶子可免費保存兩個月。
I immediately embarked on an experiment which, even though if failed to get rid of the ants, kept me fascinated for twenty-four hours.
我當即動手作了一項試驗,這項試驗盡管沒有使我擺脫這些螞蟻,卻使我著迷了24小時。