tetrahydro

例句：

1. 1. This compound has a tetrahydro structure, which makes it difficult to synthesize.
   这种化合物具有四氢结构，这使得其合成困难。
2. 2. The tetrahydro compound is used in the production of plastics.
   四氢化合物用于生产塑料。
3. 3. Tetrahydro compounds have unique properties that make them useful in various applications.
   四氢化合物具有独特的性质，使其在各种应用中非常有用。