The activity, in the final analysis, is a practice activity.

这种活动归根到底是一种实践活动。

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School running has already become an important practice activity.

学校经营已成为学校一项重要实践活动。

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During school, besides study I attended some social practice activity.

在校期间，学习之余我曾参加过一些社会实践活动。

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Rivera will continue shagging fly balls in batting practice, an activity that has the approval of Yankees manager Joe Girardi.

WSJ: Rivera plans to announce if this is final season

Many faiths know a moment when a territorial practice gets pointed toward a symbolic and indoor activity: thus, most famously, the move from the Temple Judaism of ancient Israel to the Talmudic, rabbinical Judaism that arose after the destruction of the Temple.

NEWYORKER: I, Nephi

If "placentophagia" - the practice of eating the placenta - remains a minority activity, there have been other applications.

BBC: NEWS | UK | Magazine | Why eat a placenta?