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There have been riots before and the situation is volatile.
先前一直就有暴乱，局势变化无常。
《柯林斯英汉双解大词典》
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After the riots, the military was brought in to restore law and order.
暴乱以后，军队出动来恢复治安。
《牛津词典》
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After the riots, the military was brought in to restore law and order.
暴乱以后，军队出动来恢复治安。
《牛津词典》