膨胀

péngzhàng

to expand; to inflate

Traditional 膨脹

Meaning

péngzhàng peng2 zhang4

shǒuxiān首先，yīnwèi因为hǎishuǐ海水biànrè变热shí时péngzhàng膨胀，hǎipíngmiàn海平面kěnéng可能tígāo提高。

First of all, the level of the ocean could rise, because ocean water expands as it grows warmer.