型内含子的序列差异很大，但是它们都具有保守的碱基配对区，即保守的二级结构。
Although having great variance in sequence, group I introns share a number of conserved base-paired regions, which take part in the formation of the catalytic structure.
如果应用程序非常依赖短期存活的类加载器，且托儿所收集能够及时处理其他已分配对象，那么保留区收集可能不会频繁发生。
If an application relies heavily on short-lived class loaders, and nursery collections can keep up with any other allocated objects, then tenure collections might not happen very frequently.
方法在黄浦区某社区对94名有心理卫生问题的老年人进行干预前后的配对t检验，并设对照组和心理健康组。
METHODS We divided them into intervention groups, control one and health one, among which we interviewed 94 old people with psychological health problems and adopted analysis of paired-t test as well.
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