millions of tons of watermillions of tons of waste water is being poured ……这里为什么用is?Millions of tons不用are吗?那为什么piees of paper后就用复数？

millions of tons of watermillions of tons of waste water is being poured ……这里为什么用is?Millions of tons不用are吗?那为什么piees of paper后就用复数？ tons of是什么意思 tons of pets是什么 handreds of millions of hunderds of millions of 50 tons of paint意思 line of 10-tons trucks 英语millions of millions of people是什么意思 millions of与million millions of(翻译) several millions of millions of的意思 millions of 的意思 millions of 的用法 millions of thanks是什么意思 tens of millions tens of millions of 等于 thousands of millions and millions of的中文意思