为什么左边标注millions?million不是不应该加s吗?像2 million?

为什么左边标注millions?million不是不应该加s吗?像2 million? MILL millions 为什么用millions of不用millions?Millions of foreign friends come to visit China every year. mill是什么意思 mill是什么意思 millions of times为什么time要加s millions of cattle 为什么million加s cattle 不加 hold millions pages of writing writing为什么不加s 一道有疑问的英语题1.Trees have grown and died for_______.A.millions of yearsB.millions years C.millions of year B.为什么 you can see______ in the sky at nightA.millions stars B.million stars c.millions of stars D.many millions stars选哪个/?为什么?意思是? 灯珠45mill的mill是什么意思 1,The twins are wearing the（ ）jeans A,latter B,late C,later D,latest2,If I were you,i'd sleep after（ ）along walkA,take B,taking C,takes D,to take3,it's hard to say.（ ）people ,I thinkA,Millions of B,Million of C,Three millions D,Three mill 五道1.--How many people watched the TV show named I'm a singer on1.--How many people watched the TV show named I'm a singer on Hunan TV Station last Firday?--It's hard to say.( )people,I think.A.Millions of B.Million of C.Two millions of D.Two mill 气压单位mill.气压表显示在7627mill.至7569mill.间,这里的mill.是什么? Mill CFU/ml circular mill 是什么单位 mill是什么意思啊?