在过去的两年里，尽管我们继续增加员工，我们的利润率却一直在下降。

For the past two years, our profit margin has been falling, even though we have continued to add employees.

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但是美国的新发感染率却一直在下降。

And yet the rate of new infections is falling in the U.S..

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因为尽管在过去的二十年里，美国使用手机的人数骤增，但患脑癌的人数比例却一直在下降。

Despite a huge upsurge in cellphone use over the past two decades, brain cancer rates in the United States have been declining.

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