快递公司保证在24小时内更新包裹递送信息。

The courier company guarantees a 24-hour ___turnaround for package delivery updates.

港口通过优化装卸流程，将货船的周转时间缩短到了24小时。

The port optimized loading procedures to reduce cargo ship ___turnaround time to 24 hours.

政府政策的突然转变让所有人都感到惊讶。

The sudden ___turnaround in government policy surprised everyone.