历史已经将我们引领到一个新的十字路口，既有新承诺也有新危险。

History has led us to a new crossroad, with new promise and new peril.

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新的研究发现，膝盖受伤，特别是前十字韧带(ACL)受伤，是最普遍和最严重的。

Knee injuries, especially to the anterior cruciate ligament (ACL), are some of the most common and serious, the new study found.

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在这十字路口，需要创造性的破坏，关闭一些系统并将雇员转移到新的系统。

At this crossroads, "creative destruction" will require hard decisions about shutting down certain systems and processes and focusing employees on new ones.

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