calarene

例句：

1. 1.The molecule is composed of carbon, hydrogen, and oxygen atoms.
   这个分子由碳、氢和氧原子组成。
2. 2.Calarene is a rare element that occurs naturally in trace amounts.
   卡拉尔恩是一种稀有元素，自然中以微量存在。
3. 3. The discovery of calarene has sparked interest in the properties of other similar elements.
   卡拉尔恩的发现激发了对其他类似元素特性的兴趣。