http://www.freerice.com 的網上單字遊戲，玩家答對一題，熒幕下面出現的廣告即產生出廣收益，而每題收益將用於買十粒米贈予聯合國世界糧食計劃署。無需註冊，隨時開始隨時中斷遊戲也無礙捐贈。下面是三個常見問題原文節錄：
What happens if my computer suddenly loses power while I am in the middle of playing?Once your screen says that you have donated a certain amount of rice, your donation has already been counted.
Who pays for the donated rice?
The rice is paid for by the advertisers whose names you see on the bottom of your vocabulary screen.
The rice is paid for by the advertisers whose names you see on the bottom of your vocabulary screen.
If FreeRice has the rice to give, why not give it all away right now?
When you play the game, advertisements appear on the bottom of your screen. The money generated by these advertisements is then used to buy the rice.
When you play the game, advertisements appear on the bottom of your screen. The money generated by these advertisements is then used to buy the rice.
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