gels

例句：

1. 1. The gels in the jar have been left to set for a few hours.
   罐子里的凝胶已经放置了几个小时。
2. 2. She put some gels on her face to make it look more youthful.
   她涂了一些凝胶在脸上，让脸看起来更年轻。
3. 3. The gels were used to treat burns and wounds.
   这些凝胶被用来治疗烧伤和伤口。