preparatory [prɪˈpærətri]

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adj.预备的，初步的；adv.在先前，作为准备；n.大学预科

done in order to get ready for something

All the preparatory work has been completed.各项准备工作均已就绪。
He made his will preparatory to his voyage.他在出航前立下了遗嘱。