我是认真的，这次考试真的很重要。

I'm ___serious this time, the exam is really important.

新的语音识别系统可以实时将医生的口述转为电子病历。

The new ___SRS can convert doctors' dictations into electronic records in real time.

我用SRS软件来记忆日语单词，效果非常好。

I use an ___SRS program to memorize Japanese words, and it works amazingly well.