Yeah, it's lovely, but to be frank, it's not the most practical.

恩，很好看，但是说实话，不太实用。

Yeah, but to be completely frank, it wasn't enough.

是的 可是坦白说吧 那完全不够。

This work has been intense all over the weekend and yesterday, because even if that agreement will be more and more difficult, to be frank, it's still possible this week.

整个周末和昨天谈判工作都很紧张，尽管达成协议越来越困难，但坦率地说，本周仍有达成协议的可能性。