The team’s defeat is a salutary warning before the World Cup.

这次失利是在世界杯比赛之前对整个队的一个有益警示。

To keep their art alive, the slaves turned capoeira into a dance, and the berimbau, which had warned of an approaching master, began to accompany the dance itself.

为能够使这种流传下来，奴隶们将它变成。用来警示主人到来的波凌波琴，被用来给这种做伴奏。