他在赌桌上赢了一局21点。

He won a round of ___blackjack at the table.

警察在他的口袋里发现了一把折叠的黑杰克棍。

The police found a folded ___blackjack in his pocket.

这片森林里生长着许多黑杰克橡树。

There are many ___blackjack oaks growing in this forest.