A sharp whistle woke us up in the early morning.

一大早，一声尖锐的哨声把我们吵醒了。

youdao

Suddenly the air was cut by a sharp whistle not far away.

VOA: special.2010.04.03

And as Barcelona's name was carved on the giant trophy at the final whistle, with the celebrations of the Catalan fans a sharp contrast to the subdued Manchester United supporters, there was no doubting their right to claim Europe's elite trophy for the third time.

BBC: Barcelona 2-0 Man Utd