例如，如果考虑版本化和对比区别，一组气泡可以显示更改的方法。
For example, if you think about versioning and diffs, a group of bubbles could be displayed showing the methods that have changed.
NIST测量客户的热电压转换器，用来和那些由串联热电偶和一个电阻相乘的AC - DC对比区别。
NIST measures the AC-DC difference of customer's thermal voltage converters by comparing them with standards composed of a thermoelement in series with a multiplying resistor.
当科学家们第一次将古典克雷莫纳小提琴的木材与现代小提琴的木材进行对比分析时，他们计算了平均密度，并没有发现区别。
When scientists first analyzed the wood of vintage Cremonese violins in compared with the modern violin wood, they calculated the average density and found no difference.
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