He heard the school bell ring.

他听见学校的铃响了。

《柯林斯英汉双解大词典》

I wake up only if the school bell rings.

只有学校的钟响了，我才会醒。

youdao

If you're a Teacher, take a breath each time the school bell rings.

如果你是一个老师，每次上课铃声响时，放松呼吸吧。

youdao

(SCHOOL BELL RINGING) Port Angeles? You mind if I come?

VOA: standard.other

(SCHOOL BELL RINGING) EDWARD: There must be something open.

VOA: standard.other

The next year Bell moved to Boston,Massachusetts, to teach at a school for the deaf.

VOA: special.2010.05.14

All worked long past the school bell to give the children in their care a future worth their talents.

WHITEHOUSE: President Obama Presents the 2012 Presidential Citizens Medals | The White House

In Los Angeles, the nation's second-largest district, the first school bell rang for 600, 000 students on Aug. 14, three weeks earlier than the normal start.

WSJ: School in August Gets Low Grades

Over two-thirds of parents surveyed told researchers that they planned to purchase name-brand sneakers and jeans for their children before the first school bell rings this fall.

FORBES: Best Credit Cards For Back-to-School Expenses