介绍:
20171121
816. At this time of the year farmers begin to plow their fields.
每年这个时候，农民们开始犁地。
817. Have you milked the cows? 你已经挤过奶了吗？
818. Pile the hay in the corner. 把干草堆到边上。
819. What's the average yearly output of cars in your factory?
你们厂平均年产汽车多少台？
820. The meat packing industry is developing fast. 肉类加工业发展迅速。
