It is a labor to task the faculties of a man — such problems of profit and loss, of interest, of tare and tret,(8) and gauging of all kinds in it, as demand a universal knowledge.
这真是一个辛苦的劳役,着一个人的全部官能,——这些赢利或损失的问题,利息的问题,扣除皮重的计算问题,一切都要确数字,非得有全宇宙的知识不可啊。