sale
1.on sale和for sale都作“出卖的”解。put up for sale有时作“出卖”解，有时作“拍卖”解。
2.说货物的“销数”或“销路”通常用复数形式sales，前面有时有the，有时没有the。例如：The sales of this book maintain a yearly average of ten thousand copies. 和Sales of that type of article always drop off during the winter months.
