但是，后来人们发现，实际上是大量的日本家庭主妇在做这件事情，而要想制止家庭主妇做套利交易，难度非常大。
But people found afterwards that, actually a mass of Japanese house wives were doing this, while it's very hard to stop house wives to do this.
另一个变化是在太平洋出现了大量的废弃塑料在两个地点集中漂浮着，每一个都有美国那么大。
Another change is the appearance of a mass of discarded plastic that swirls round in two clots in the Pacific, each as large as the United States.
他们要从大量庞杂的证据中推断事实。
They should evolve the truth from a mass of confused evidence.
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