双语例句原声例句权威例句
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What this magical number represents - 7 plus or minus 2 - is the number of items we can hold in our short-term memory.
这个神奇数字(7正负偏差2)代表着我们的短期记忆能记多少。
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But last month it hit 6.59 per cent, breaching the top of the central bank's target range of 4.5 per cent plus or minus 2 percentage points.
然而，上个月巴西的通胀率达到6.59%，打破了巴西央行设定的4.5%上下浮动2个百分点的目标区间。
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Your career should bring headline news on the full moon November 2, plus or minus four days.
你的事业应该在十二月满月的时候到达顶峰，也可能比这个日子推迟或者提前四天左右。
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That's equal to seven minus six minus two 3 times 4.19, or 4.19 plus 2.3.
算出来是7-6-2*4。19的平方,或者4。19加2。
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It's always a good first approximation, because you need to start somewhere in terms of drawing Lewis structures, but then if you go and figure out the formal charge and you just have lots of charge separation or very high charges, like a plus 2 and a minus 2 and a minus 1 all different places in the atom, what it should tell you is maybe there's a better structure.
它总是一个好的第一近似，因为在画路易斯结构的时候,你总需要一个起点，但是如果你在算出形式电荷之后,发现有很多电荷分开了,或者说有很高的电荷，比如有一个正二，一个负二，还有一个负一1,在原子的各个地方，这应该就是在告诉你,或许还有一个更好的路易斯结构。
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