youdao

'Let me explain!' he added helpfully.

“让我来说明一下！”他热心地补充道。

《牛津词典》

He gave his name and then helpfully spelled it.

他说出了他的名字，然后又热心地把它拼读了出来。

《柯林斯英汉双解大词典》

Better to avoid the unstable hammocks altogether, since they're filled with snakes, occasional bears, and flesh-eating plants that, helpfully,feed on mosquitoes.

VOA: standard.2010.03.29

Organisers have helpfully put on shuttle busses to take press from downtown Malmo to the arena.

BBC: Eurovision Song Contest 2013: Reporter's log

The next sentence offered the names of contacts at DOT and helpfully included a phone number.

WSJ: Lost Cause in New York

As the site helpfully points out, telling a story is different from lodging a complaint.

FORBES: Consumerfinance.gov: This Is a Government Website?