They aren't serious enough at that age.

在当时那个年纪，他们不是严重的。

youdao

I agree. They aren't serious enough at that age.

他们在那个年龄不够认真。

youdao

If serious games aren't fun, they won't be played by your average person.

如果严肃的游戏不好玩，一般人将不会玩它。

youdao

But that doesn't mean they aren't serious about food.

WSJ: Zynga Culinary: The Tech World's Hottest Meal Ticket

So when European leaders tell Israelis that we need to convince them we are serious about peace, they aren't being serious.

CENTERFORSECURITYPOLICY: Netanyahu's time to choose

Creative's latest set, Fatal1ty Professional Series Gaming Headset MkII, don't really have much to offer in the flash category and certainly aren't excessively sized, but for serious gamers they seem to be a solid option and just the thing to keep your mom from interrupting your session.

ENGADGET: Creative's Fatal1ty Professional Series Gaming Headset MkII hands-on, and news of its sequel