他们正在咖啡馆里认真地讨论工作计划。

Tāmen zhèngzài kāfēiguǎn lǐ rènzhēn de tǎolùn gōngzuò jìhuà.

They are seriously discussing the work plan in the café.

我们在上课的时候讨论了这个问题。

Wǒmen zài shàngkè de shíhou tǎolùn le zhège wèntí.

We discussed this question during class.