他的背包塞得太满，侧面都鼓起来了。

His backpack was so full that the sides were ___bulging.

他的背包塞得太满，拉链都快撑开了。

His backpack was ___bulging so much that the zipper could barely close.

他的口袋因为装满了硬币而鼓了起来。

His pocket was ___bulging with all the coins inside.