After being warned by his mother to swear off that demon knuckle cracking, young Donald Unger tested the accuracy of this hypothesis on himself.

自从小时候受到母亲警告说不可以敲打指关节后，小唐就开始在自己的身上测试这种推断的准确性。

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Left South Africa with five goals, four of which were superb strikes from distance, including a cracking volley in the third-place play-off against Germany.

弗兰在本届世界杯共奉献五粒进球，其中四粒都是世界波，包括在与德国争夺第三名的比赛中的一脚凌空抽射。

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The shale roof-made of the sediment that destroyed the forest so long ago-is cracking and flaking off now that the coal below it has been removed.

页岩层顶部是由远古时候掩埋森林的沉积物构成。由于埋藏其下的煤已经被挖走，所以这些页岩有开裂和剥落现象。

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There were two cracking cover-drives off Harmison and Liam Plunkett in the morning and at that point it was clear that Monty Panesar was likely to prove a tougher opponent.

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We have done a good job of cracking down on off-label use of many medicines, and on limiting the overselling of new drugs.

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But because of the Academies Bill's timetable, "we have the spectacle of ministers who have already told us they will accept no amendment, period, and the sight of whips new and old cracking their knuckles off-stage and perfecting basilisk-like stares in the mirror" to prevent MPs voting for any changes, he said.

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