I'm totally serious.

我很严肃。

youdao

No, I'm totally serious. It really happened.

不，我百分百是认真的。真有其事。

youdao

Valve Disadvantages: Although the improvements to this generation of valves eliminate the more serious problems of damage from abusive closing, they are not totally immune to abuse.

阀门的缺点：尽管对这一代阀门的改进排除了由于粗暴关闭造成的损害问题中比较严重的问题，但它们还不能完全防止机械损伤。

youdao

This guy is totally serious.

FORBES: Scientist Pitches Proposal to Curb Bird Deaths: A Tax On Cats

Cases like this make it clear that the sanctions provided for by the Federal Data Protection Act are totally inadequate for the punishment of such serious breaches of data protection.

ENGADGET: Google fined $190,000 in Germany for illegal WiFi snooping with Street View cars

So you cannot totally exclude the possibility that people can sometimes suffer serious health effects from this type of ammunition.

BBC: Pressure grows for uranium tests