The African prairie is a paradise for wildebeests. There is a fertile pasture where the grass grows evenly every day. This grassland can feed 40 wildebeests for 7 days, or 80 wildebeests for 3 days. When 50 wildebeests migrated to this pasture, they were targeted by a group of lions. If the lions hunted two wildebeests every night, it would A group of wildebeest will leave this place in a few days to find new food. (If the grass is eaten up, the wildebeest will leave the next day)
非洲大草原是角马的乐土，其中有一块肥美的草场，草每天均匀生长．这片草地可供40头角马吃7天，或可供80头角马吃3天，有50头角马迁徙到这片草场就被一群狮子盯上了，如果每天晚上狮子都捕猎两头角马，这群角马第几天就会离开此地寻找新的食物．(如果草被吃光，角马第二天就会离开)
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