The causes of IBS are unclear and there has been debate whether it is mostly due to psychological factors or biological triggers, or perhaps a combination.

病因尚不得知，就其是否是心理因素或者是生理因素还是综合的情况争论至今不休。

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Is the just city, perhaps, that Socrates will later consider, ? a combination of these two of both force and persuasion?

或许苏格拉底，稍后所提的正义之城，即是这两者的合一,武力与说服力？

耶鲁公开课 - 政治哲学导论课程节选

Russ Coe, a barman who studied environmental politics (a combination of roles perhaps distinct to Brighton) says he has not noticed much of a difference.

ECONOMIST: The Greens in Brighton

Jurassic Park is perhaps a defining example of the perfect combination of newfangled and old-school blockbuster film-making.

FORBES: The Box Office Legacy Of 'Jurassic Park,' 20 Years Later

Perhaps, in truth, it is a combination of all these factors.

ECONOMIST: Mexico: Buddy, can you spare a peso | The