Buses to Oxford run every half hour.

去牛津的公共汽车每半小时开一班。

youdao

Every half hour, something amazing happened.

每隔半小时，神奇的事情便会发生。

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Every half hour, the water bowl becomes full and sinks completely.

每隔半小时，水碗就会变满并完全下沉。

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In its overview, GAO said the Office of Cuba Broadcasting lacks a formal strategic plan to guide decision-making on its funding and operations, including a proposal to reduce TV Mart newscasts from two 30 minute evening programs to five minute news updates every half hour.

VOA: standard.2009.06.18

The findings suggest that even a half-hour walk at a quick speed every day could lower the risk of cognitive impairment.

VOA: special.2011.07.27

The psychiatrists did not put him in the highest risk category for suicide and ordered for him to be monitored at least every half hour by cameras in his cell.

BBC: Israel clears jail staff in Prisoner X suicide

Led by militant nationalist Korshunov (played by the excellent and eerie Gary Oldman), they threaten to execute one passenger every half hour until their hero, imprisoned General Alexander Radek, is released.

CNN: Sights & Sounds

The Antiquorum automaton includes a clock, which activates the automaton every half hour, triggering the bird to sing one of seven popular tunes (as live canaries of the time were routinely trained to do).

FORBES: Collecting