conserving

/kənˈsɜːv/ 9六级雅思托福GREgmat
If you conserve a supply of something, you use it carefully so that it lasts for a long time. 节省

verb [vt. 及物动词]节省;保护,保藏;将……制成蜜饯(conserve 的现在分词)

In colder weather, your cat will curl up into a tight, heat-conserving ball.
在更冷的天气里,你的猫会蜷缩成紧紧的一团来保暖。

单词造句: