If their population is tracked through time, it will be seen to be particularly unstable—soaring and plummeting in irregular cycles.
如果对它们的数量进行时间记录，就会发现它是很不稳定的——以不规则的周期急剧上升下降。
2
The reason is that in most cases, the scripting language is interpreted "on the fly" and loses time and CPU cycles having to parse and validate text as it's executed.
其中的原因是，大多数情况下脚本语言是 “即时” 解译的，因而它在执行时会损失一些解析和验证文本的时间和 CPU 周期。
3
For example, ISVs must decide which versions of a DBMS their applications will support, knowing that each extra version adds development time, quality assurance cycles, and customer-support costs.