Having the disease means her muscles, including her heart and muscles that control breathing, will get weaker and weaker.

得了这个病，意味着她的肌肉，包括她的心脏和控制呼吸的肌肉，都会变得越来越弱。

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Then I started to get weaker and weaker, until I could only enjoy football from a bench at the stadium.

后来，我的身体开始变得越来越虚弱，以至于只能坐在体育场的长凳上欣赏足球了。

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The problem with electrical signals is that they get weaker and weaker as they travel along metal wires.

电话号的问题是，当它们沿着金属导线传送时，信号会变得越来越弱。

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improve your range of motion and strengthen those muscles, they get weaker during that process

改善你的运动范围并加强这些肌肉，它们就会在运动过程中变弱，

健康生活 - SpeakingMax英语口语达人

Since that time, the stock has increased small amount, but the expectations for the future seem to get weaker and weaker.

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Startups will consolidate or die in the emerging Asian tech strongholds of China and India as the strong get stronger and the weak get weaker.

FORBES: Predicting 10 Trends For Startup Asia As 2013 Unfolds

The general level of inflation-proofing that both public and private schemes offer, looks set to get weaker.

BBC: How to cope with financial difficulties