另一方面，这一行业也有令人头疼的地方，就是“年龄压缩”现象：孩子们成长得比原来要快。
A headache for the business, on the other hand, is "age compression" : kids are growing up faster than they used to.
图1中的图形描述了从日志文件中观察到的压缩比。
The graph in Figure 1 depicts the Compression Ratio observed from the log files.
然而压缩带来的帮助是有限度的，位图依然比矢量图形大很多。
While compression helps to a certain extent, bitmaps still tend to be larger than vector images.
理想情况下，乙醇发动机需要的压缩比是19：1，而不是典型汽油引擎的10：1。
Ideally, an ethanol engine needs a compression ratio of 19:1 instead of the 10:1 typical of petrol engines.
氢气比空气轻，但是将它经压缩存储在燃料箱中并添加所有必需设备后飞机又变重了。
Hydrogen is lighter than air, but compressing it, storing it in tanks and adding all the necessary equipment starts to tip the scales towards heavy again.
不幸的是，由于缺乏某些调整压缩比的专门方法，这样的引擎如果燃烧汽油的话会立刻四分五裂。
Unfortunately, without some special means for altering the compression ratio, such engines would quickly disintegrate if fuelled with petrol.
对于两种风格的文档而言(对于每种压缩技术)，已压缩文件中的文件大小差异比XML和文本原始文件之间的差异要小。
For both styles of documents (for every compression technique), the size differences in compressed files is much smaller than between the XML versus text originals.
由于它的扫描范围比其他压缩技术更大，它可以找到并压缩更多的重复模式，因此实现的压缩率非常高(见图1)。
By scanning a larger area than other compression techniques, it can find and compress more repeating patterns, and thus achieve very high compression ratios (see Figure 1).
这将帮助客户根据其当前压缩比和CPU开销确定最优的扩展因数。
This helps customers to decide what would be the optimal expansion factor based on their current compression ratio and CPU overhead.
扩展式目录编目提供了未经压缩的条目，因此该目录编目比便携式目录编目大得多。
The extended directory catalog offers no compression of entries, which results in the extended directory catalog being much larger in size than the mobile directory catalog.
这些录音的可分辨率比以前的更加清晰，更多的压缩录音在澳大利亚人的调查研究中使用过。
These are discernibly clearer than earlier, more heavily compressed recordings used by the Australian investigation.
但如果您有时间和内存，xmlppm可以达到令人惊讶的压缩比。
But if you have the time and memory, XMLPPM achieves astonishing compression rates.
另外，7zip还提供自己的格式，这种格式的压缩率比任何其他方案都高，容量限制达到tb级，支持强大的数据加密。
Further, 7zip also proffers its own format, featuring a higher compression ratio than any other scheme, gigantic capacity reaching into terabytes, and strong data encryption.
内存中工作负载数据的平均压缩比。
The average compression ratio of the in-memory data of the workload.
内联xML数据通常可以达到70%到80%的压缩比。
It's not uncommon to compress inlined XML data by 70 to 85 percent. The following statement can be used to check the compression ratio of the "product" table.
我发现所有被研究的压缩产品都会给出大致相等的压缩比。
I observed that all the compression products investigated render more or less equal compression ratios.
我发现这两个商业产品虽然能够提供较好的压缩比，但不能提供有利于项目目标的任何明显优势。
I discovered that the commercial products offer comparable compression ratios, but do not offer any overwhelming benefit for the project's goals.
有某几种人是会把自己的休闲时间压缩得比别人少的。
There are certain kinds of people who allow themselves lesser leisure time than others.
块大小比较小时，压缩比文件级别压缩差很多。
At small block sizes, compression is much worse than file-level compression.
当使用XML文档的特定结构以产生可压缩性更好的表示时，您就可以取得好得多的压缩比。
You can obtain considerably better compression rates when you use the specific structure of XML documents to produce more compressible representations.
这三种产品的压缩比几乎一样，这可能是由于使用的底层算法是相同的。
All three products show almost equal compression ratios, probably because the underlying algorithm used was the same.
这类压缩器主要侧重于实现最高的压缩比。
The main focus of this group is to achieve the highest compression ratio.
在允许的时候，尽量使用JPG并调整品质设置，以便在可以忍受的图像品质范围内获得更高的压缩比。
When you can, use JPG instead and adjust the quality setting so you can compress the image as much as possible within your desired tolerance for image quality.
压缩比是从单个产品的日志文件标记录出来的。
The compression ratios were noted from individual products' log files.
这类压缩器的压缩比通常比归档XML压缩器的压缩比差。
The compression ratio of this group is usually worse than that of the archival XML compressors.
清单5演示如何查询这个视图，从而了解关系和XML数据的压缩分别节省的空间的百分比。
Listing 5 shows how querying this view produces information about the percentage of space saved due to the compression of relational data and XML, respectively.
这种压缩器旨在利用对XML文档结构的感知，实现比一般文本压缩器更好的压缩比率。
This group of compressors is designed to take advantage of the awareness of the XML document structure to achieve better compression ratios over general text compressors.
在主存储上使用重复数据删除也会有成效，但却不要期望可以达到像备份实施时典型的2.5倍到3倍的比例这样高的数据压缩比。
There are some gains to be had here, but don't expect the same data reduction ratios that you'll see in backup operations; 2.5X to 3X is typical.
还可以有更好的压缩算法；这不过是为了证明倒排表可以用于比单个比特更宽的通道。
There are much better compression algorithms; this is just a demonstration of how inversion lists can be applied to wider channels than a single bit string.
表1给出了压缩比和下载时间。
Table 1 illustrates the compression ratios and download times achieved.
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