round off number 修整数 ; 取整数
round-off number [数] 舍入数
parametric take-off number 参数起飞数
off-standard number 非标准数
cut-off wave number 截止波数
check off the number of 查对…的数
V to call out or cause to call out one's number or place in a sequence, esp in a rank of soldiers 报数
the sergeant numbered his men off from the right
In Eastern Europe, the number of new H.I.V.infections has leveled off.
VOA: special.2009.12.08
It's true of Windows, it's true of the Sequel Databases from guys like Oracle, the Google guys were at it for a number of years before that thing really took off.
视窗“系统就是这样,甲骨文公司的关系数据库也是这样,谷歌公司的创立者花了很多年,才让一切走上正轨。
So in terms of nitrogen that starts off with a valence number of 5, again we have 2 lone pair electrons in the nitrogen, and again, we have 6 electrons that are shared.
对于氮来说,我们应该从五个价电子开始,同样,氮也有两个孤对电子,共用电子的个数也一样,是六个。
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