In some areas of Uganda, rates of brown streak reached more than eighty-five percent in two thousand five and two thousand eight.
VOA: special.2010.06.08
If we take nitrogen, we've got N2, and we've got one, two, three, four, five.
比如说氮,我们得到了氮气,我们有一个,两个,三个,四个,五个。
Here is an example that shows some very, very metallic elements, groups one and two, and some non-metallic elements over here, five, six and seven.
举个例子,这个例子表明金属元素,第一族和第二族,与一些非金属元素,在这里,第五族,第六族,和第七族。
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