small molecule

例句：

1. 1. Small molecules can be detected by mass spectrometry.
   通过质谱可以检测到小分子。
2. 2.The small molecules in the sample are responsible for its color.
   样品中的小分子是其颜色的原因。
3. 3. The discovery of a new small molecule could lead to breakthroughs in medicine.
   发现一种新的小分子可能会在医学上带来突破。