3 sentences for 团 (tuán — functional group)

1. 硫酸根是带电的离子团。

   liú​suān gēn shì dài​diàn de lí​zǐ tuán.

   The sulfate radical is a group of charged ions.

   Source: Dong Chinese Dictionary

2. 羟基是醇类分子的特征官能团。

   qiǎng jī shì chún lèi fēn​zǐ de tè​zhēng guān​néng tuán.

   The hydroxyl group is the characteristic functional group of alcohol molecules.

   Source: Dong Chinese Dictionary

3. 丙基是含有三个碳原子的有机官能团。

   bǐng jī shì hán​yǒu sān gè tàn yuán​zǐ de yǒu​jī guān​néng tuán.

   Propyl is an organic functional group containing three carbon atoms.

   Source: Dong Chinese Dictionary