你也许注意到,我在本文中用了很多次“感受”这个词。
你也许注意到,这感染也越来越复杂随着时间的推移。
You've maybe noticed, that infections are getting more complex as time goes on.
你也许注意到如今美国有原来越多的中年人在用拐杖、轮椅。
You might have noticeda lot more middle-age Americans using canes, walkers, and wheelchairs thesedays.
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