liquid rubber

例句：

1. 1.Water is a common liquid substance.
   水是一种常见的液体物质。
2. 2. The liquid in the bottle has turned to ice.
   瓶子里的液体已经变成了冰。
3. 3. The liquid level in the tank needs to be checked regularly.
   油箱里的液体水平需要定期检查。