另一个模型为分代GC内存模型。
X and before IBM-developed Java implementations, as well as a generational GC memory model.
其他有趣的统计信息与对象分代有关。
Other interesting statistics have to do with object generations.
gencon：使用分代并发收集样式。
SUN的JVM1.3.1使用分代垃圾收集算法。
SUN's JVM 1.3.1 USES a generational garbage collection algorithm.
完整性的目的，我们将开发完整的分代算法。
For the purpose of completeness we will develop the complete generational algorithm.
这一分代的键模式有一个大问题，在于它不会删除所有失效的键值。
There was a big problem with this generational scheme because it didn't delete all the invalid keys.
分代收集器对不同的代可以自由使用不同的收集策略，对各代分别进行垃圾收集。
A generational collector is free to use a different collection strategy for different generations and perform garbage collection on the generations separately.
分代垃圾收集器把堆分成多代；多数JVM使用两代，“年轻代”和“年老代”。
A generational garbage collector divides the heap into multiple generations; most JVMs use two generations, a "young" and an "old" generation.
之所以首选分代GC内存模型，是因为大型JVM必须尽可能减少执行gc的时间。
The reason that a generational GC memory model is preferred with large JVMs has to do with minimizing the amount of time spent performing GC.
分代收集器(generializational collector)将堆分为多个代。
A generational collector divides the heap into multiple generations.
分代跟踪收集器从根集开始，但是并不遍历指向更老一代中对象的引用，这减少了要跟踪的对象图的大小。
A generational tracing collector starts from the root set, but does not traverse references that lead to objects in the older generation, which reduces the size of the object graph to be traced.
切换到分代垃圾回收可以改善IBMJVM 的性能，对于较大的堆而言，性能可以提升 5% 左右。
Switching to generational GC can improve performance on IBM JVMs, particularly for larger heap sizes, typically by around 5%.
分代GC策略非常适合创建很多短期存活的对象的应用程序，这种情况对于中间件解决方案很常见。
Generational GC is a policy that is best suited to applications that create many short-lived objects, which is typical of middleware solutions.
还应该分析gc日志，以了解年老代空间回收的频率；最优的分代应用程序进行年老代空间回收操作的频率应该非常低。
You should also analyze GC logs to understand how frequently the tenured space gets collected; an optimal generational application will have very infrequent collection in the tenured space.
由于我们的gcstressthread生成了一个不断变化的活动数据集，所以使用分代GC策略并不能提供太多暂停时间优势。
Because our GCStressThread generates a constantly changing set of live data, using a generational GC policy isn't expected to provide much pause-time benefit.
JD K 1.2及以后版本所使用的分代垃圾收集器提供了比早期JDK所使用的标记-清除-整理收集器好得多的分配和收集性能。
The generational collector employed by JDK 1.2 and later offers far better allocation and collection performance than the mark-sweep-compact collector used by earlier JDKs.
尽管许多GC模型都具有自己的优缺点，但当应用程序的目标是缩短GC暂停时，两个主要的选择将是分代(generational)和实时收集器。
Although each of the many GC models has its pros and cons, when the goal for an application is short GC pauses, the two main choices are generational and real-time collectors.
10分代表非常可信，即便在被告知的情况下，实验者依然为土生土长的美国人打7.5分，带有轻微口音的人得6.95分，而带有浓重口音的人6.84分。
Even so, on a scale where 10 was most truthful, native English speakers got a score of 7.5, people with mild accents a score of 6.95 and people with heavy accents a score of 6.84.
该国的粮食产量仅占其所食粮食的60%左右，比1980年代末的近四分之三有所下降。
The country produces only about 60 per cent of the food it eats, down from almost three quarters in the late 1980s.
截至2008年底，合并后的德尔塔诺西南航空公司的飞机中有一小部分可以追溯到上世纪60年代末。
As of the end of 2008, a small percentage of the merged DeltaNorthwest's planes dated back to the late 1960s.
尽管在80年代初起步缓慢，全球经济产出在这十年中增长了百分之二十以上。
Despite a slow start at the beginning of the eighties, global economic output increased by more than a fifth during the decade.
衰退始于20世纪50年代，当时制造业创造了28%的国民收入（国内生产总值），并且雇佣了三分之一的劳动力。
The decline started in the 1950s, when manufacturing generated a sturdy 28% of the national income, or gross domestic product, and employed one-third of the workforce.
在20世纪50年代末汽车影院最受欢迎的时候，美国大约有4000家汽车影院，但如今，这个数字还不到当时的四分之一。
When drive-ins were at the height of their popularity in the late 1950's, some 4,000 existed in the United States, but today there are less than one-quarter that many.
新屏幕格式的引入被推迟了四分之一个世纪，而颜色尽管在接下来的二十年里被用于特制产品，它也是直到二十世纪五十年代才成为一种常态。
The introduction of new screen formats was put off for a quarter century, and color, though utilized over the next two decades for special productions, also did not become a norm until the 1950s.
1719年以后，女性的参与率下降到十分之一，到了17世纪70年代，这一比例降到了二十分之一。
Women's participation dropped to one in ten cases after 1719, and to one in twenty by the 1770s.
大约三分之二的人出生于20世纪70年代。
70年代中期的夏天，我在家里投篮、打棒球或投橄榄球，为我将来成为橄榄球队的四分卫做准备。
Summers in the mid-70s were spent at home shooting baskets, hitting a baseball, or throwing a football, preparing for my future as a quarterback on a football team.
这是美国政府在1950年代后期与拟精神药物联盟期间进行的一项测试的一部分。
It is part of a test conducted by the US government during its alliance with psychotomimetic drugs in the late 1950s.
撞击表明了前新生代盆地的结构，残余厚度和地下三分性。
Pre-Cenozoic basin structure, residual thickness and trichotomous property of basement are all shown by the impact.
相反这个国家沿海岸线地区的教育，尽管本身十分不足，却为一代甚至一代以前提供了劳动力。
Instead, the country coasts along on the education-itself far from perfect-provided a generation or so ago to its present workforce.
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