chemical constituent

例句：

1. 1. The new drug contains a chemical constituent that has never been seen before.
   这种新药含有一种以前从未见过的化学物质。
2. 2. The study focused on the chemical constituents of the soil.
   该研究关注土壤的化学成分。
3. 3. The discovery of this new chemical constituent could revolutionize the field of chemistry.
   这一新化学组成的发现可能会彻底改变化学领域。