我的耳朵曾一度感染，所以耳聋一段时间。
I had an infection of the ears that made me deaf for some time.
感染率在一些国家曾一度下降，但是现在又再度上升。
They warn that in some countries, infection rates were falling but are now rising again.
感染率在一些国家曾一度下降，但是现在又再度上升。
They warn that in some countries, infection rates were falling but are now rising again.
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