孩子们用弹弓把石子射到了湖对岸。

The kids used a ___catapult to shoot pebbles across the lake.

这项重大发现让这位年轻科学家一举成名。

The groundbreaking discovery ___catapulted the young scientist to fame.

他用橡皮筋和木棍做了一个简易弹弓来玩。

He made a simple ___catapult with rubber bands and a stick to play with.