This is an extremely serious case.

这是一个极为严重的情况。

youdao

This game, however, is extremely serious.

可这是一种非常严肃的游戏。

youdao

Whatever the cause of the cooling trend, its effects could be extremely serious, if not catastrophic.

不管是什么导致了气候变冷趋势，其结局如果不是灾难性的，也将是非常严重的。

youdao

There may have been several more. People who knew John Slaughter said there was no doubt they were dealing with an extremely serious man -- a man who could be very dangerous.

VOA: special.2010.03.17

Their situation was extremely serious.

VOA: special.2009.07.22

Prime Minister Silvio Berlusconi says the situation is extremely serious and there are concerns the death toll could rise to 50 or more.

VOA: standard.2009.10.03

"These acts are extremely serious, " Mr Koubbi said before he filed the legal complaint.

BBC: Strauss-Kahn faces Tristane Banon rape allegation

And I would simply remind you that Mr. Pollard was convicted of extremely serious crimes.

WHITEHOUSE: Press Briefing

Of those, 129 had injuries from firearms, and those injuries were extremely serious compared with the others.

CNN: Kids and guns: 'These are not isolated tragedies'