水库附近土地购买的新限制已经实施。

New restrictions have been placed on the ___purchase of land near the reservoir.

参加这个竞赛无需购买任何东西。

No ___purchase is necessary to enter this contest.

要获得退款，您必须退回物品并附上收据作为购买证明。

To receive a refund, you must return the items along with the receipt as proof of ___purchase.