be set to do：必定做某事；必将做某事。

The number of babies born in China last year fell to a nearly six-decade low,  exacerbating a looming demographic crisis that is set to reshape the world’s most populous nation and threaten its economic vitality.

【翻译】中国去年出生的婴儿数量降至近60年来的最低水平，加剧了一场迫在眉睫的人口危机，这场危机必将重塑这个世界上人口最多的国家形象，并威胁到它的经济活力。