Forces welling from within can crack the crusts during events called star quakes, similar to earthquakes.

在和地震类似的被称之为星震的事件中，其内部的力量会使地壳破裂。

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This person told the Star that they have previously given the mayor crack.

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The Yankees believe that Jeter should be able to resume his rehabilitation when the new crack heals in about four to eight weeks, and could return after the All-Star break.

WSJ: Jeter expected to be back in walking boot

Flashbulbs popped as Jeter addressed the media Thursday for the first time since it was learned that Jeter has a new crack in his broken ankle, and that he will be out until at least the All Star break.

WSJ: Derek Jeter Has No Doubt He Will Return