易膨胀的

例句：

1. 1. The sponge is easy to inflate and deflate.
   海绵很容易充气和放气。
2. 2. This material is easy to expand, which makes it ideal for use in construction.
   这种材料很容易膨胀，这使得它非常适合用于建筑中。
3. 3. The balloon was easily swelled by the warm air inside.
   气球被里面的暖空气轻易地吹大了。