Campaign ads are usually thirty seconds long.
竞选广告一般只要30秒长。
Each group has five slight differences. Try to find them out in thirty seconds.
每组图有五处细微的变化！看看你能否把它们全都挑出来，限时三十秒！
Another person dies from it about every thirty seconds.
每30秒就有一个人死于疟疾。
Thirty seconds ago, they called each other "honey", but broke up with each other afterwards.
半分钟前他们俩还互称“蜜糖儿”，后来却分手了。
Thirty seconds ago, they called each other "honey", but broke up with each other afterwards.
半分钟前他们俩还互称“蜜糖儿”，后来却分手了。
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