智者说：“所有的书都说，买鞋必须按照你现有鞋子的精确尺寸。”
The wise man said, "All the books say shoes must be bought with the exact measurements of the shoes you already own."
传统的血液分析器能够计算血细胞流动的数量，并能计算出血细胞的大小尺寸，但由于拍摄速度的限制，现有的技术并不能对血细胞进行详细拍摄。
Traditional blood analyzers can count cells and extract information about their size, but they cannot take pictures of every cell because no camera is fast enough and sensitive enough for the job.
几乎所有现有的iPhone应用程序均可用于iPad，既可在屏幕中央以iPhone大小的窗口运行，亦可扩大成两倍的尺寸显示。
It can use nearly all existing iPhone apps. These can either run in a small, iPhone-size window in the middle of the screen, which makes them look tiny, or blown up to double size.
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