这些语言提供了高性能，但是存在可移植性和可靠性等问题。
These languages offer high performance, but they suffer in terms of reliability and portability.
虽然许多地区都有人口普查的统计数字，但可靠性参差不齐，也没有提供语言结构及语言社会用途方面的信息。
While census Numbers exist for many areas, they vary in reliability and provide no information about the structure of languages or their use in society.
作为一种衡量尺度，语言的可靠性甚至远在肤色之上。
As a measurement, the language is much more reliable than is the skin.
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