In the Vietnamese alphabet, a case-insensitive comparison of the two-letter pairs "NG" and "NG" is not considered equal.

在越南语字母表中，对两个字母组成的字母对“NG”和“NG”进行不区分大小写的比较时，它们被认为是不相等的。

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For example, in the Danish language, a case-insensitive comparison of the two-letter pairs "AA" and "AA" is not considered equal.

例如，在丹麦语中，对两个字母组成的字母对“AA”和“AA”进行不区分大小写的比较时，它们被认为是不相等的。

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Knome is promising to look at all 3 billion letter pairs in a person's genome, in a few months' time.

FORBES: Luxury Genes