tubulate

例句：

1. 1.The dough was shaped into a ball and placed in the oven.
   面团被捏成球状并放入烤箱。
2. 2.The chef carefully formed the pizza dough into a perfect circle.
   厨师小心翼翼地将披萨面团捏成完美的圆。
3. 3.The rocks were tumbling down the mountainside, forming a cascade of water.
   岩石从山顶滚落下来，形成了瀑布。