在每一个实例下，我运行一个简单的程序，测定循环调用一个方法10,000,000次所需的运行时间，我调用了同步和非同步两个版本，并比较了结果。

In each case, I ran a simple program that measured the run time of a loop calling a method 10,000,000 times, calling both a synchronized and an unsynchronized version, and compared the results.

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介绍了水中阴离子表面活性剂测定新方法，该法与亚甲蓝法比较，具有操作步骤简单，萃取剂用量少的优点。

The new method in the determination of negative ion surface-active agent is introduced, comparing with methylene blue method, it have merits of simple operation step and little dosage.

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方法：采用溶液颜色检查的色差法测定14批样品溶液的颜色，并与目视法作比较。

METHODS: the color of 14 batches of sample solutions was determined by chromatic aberration method, which was then compared with that by visualization.

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