2 sentences

1. 这种争论纯属浪费时间，太没意思了。

   zhè zhǒng zhēng​lùn chún​shǔ làng​fèi shí​jiān, tài méi​yì​si le.

   This kind of argument is a total waste of time and quite pointless.

   Source: Dong Chinese Dictionary

2. 他的讲座内容陈旧，听起来真没意思。

   tā de jiǎng​zuò nèi​róng chén​jiù, tīng qi​lai zhēn méi​yì​si.

   His lecture content is outdated and really boring to listen to.

   Source: Dong Chinese Dictionary