相比之下，现代的人造心脏装置虽没那么笨重，但可操作性仍然不强，因为人们须借助外接电池组提供动力用压缩空气将血液输送往全身各个部位。
Modern artificial hearts are less cumbersome, but they are still rather unwieldy because they use compressed air to pump the blood and are powered by heavy batteries.
相比之下，现代的人造心脏装置虽没那么笨重，但可操作性仍然不强，因为人们须借助外接电池组提供动力用压缩空气将血液输送往全身各个部位。
Modern artificial hearts are less cumbersome, but they are still rather unwieldy because they use compressed air to pump the blood and are powered by heavy batteries.
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