swarm

蜜蜂在一起形成一个大群。

The bees form a large ___swarm.

花园里有一大群蜜蜂在采蜜。

There was a ___swarm of bees gathering honey in the garden.

夏天的时候，蜜蜂成群结队地飞向花丛。

In summer, bees ___swarm towards the flowers in large numbers.