1、Barbiturates are a class of drugs that act as central nervous system depressants.

巴比妥类药物是一类作用于中枢神经系统的抑制剂。

2、Doctors used to prescribe barbiturates for insomnia, but they are now rarely used due to their potential for addiction and overdose.

医生过去常开巴比妥类药物治疗失眠，但现在鲜少使用，因为这些药物有成瘾和过量的风险。