serious

非常严重

To a high degree.

达到很高的程度。

极其严重

To a very high degree.

达到非常高的程度。

真的严重

To a high degree (often for emphasis).

达到很高的程度（常用于强调）。

潜在的严重性

Could possibly become serious.

有可能变得严重。

特别严重

Especially serious.

尤其严重。

非常认真

To a very high and worrying degree.

极度认真（强调）。

相当严重

To a moderate degree.

达到中等程度。

Extremely serious and not joking at all (emphatic).

完全认真

Entirely and genuinely not joking.

完全、真正地不开玩笑。

绝对认真

Completely and genuinely not joking.

完全、真正地不开玩笑。

非常认真

Extremely serious (emphatic).

极度认真（强调）。

非常认真

Completely and genuinely not joking, often used for emphasis.

完全、真正地不开玩笑，常用于强调。

没什么严重的

Used to say that a problem or illness is not bad.

用来表示问题或疾病不严重。

严重到需要…

Bad enough to justify a particular action.

情况足够糟糕，有理由采取某种特定行动。

是认真的

Used to describe a state of being bad or dangerous.

不是在开玩笑。

变得严肃

To change to a state of being bad or dangerous.

停止开玩笑，采取严肃的态度。

变得严重

To change to a state of being bad or dangerous (more informal).

转变为不好或危险的状态（更口语化）。

表情严肃

To appear bad or dangerous.

表情不是在开玩笑。

似乎很严重

To give the impression of being bad or dangerous.

给人一种情况不好或危险的印象。

听起来很认真

To sound as if a situation is bad or dangerous.

语气不是在开玩笑。

保持严肃

To continue to be in a bad or dangerous state.

继续不开玩笑。

是认真的

To not be joking.

不是在开玩笑。

表情严肃

To have an expression that is not joking.

表情不是在开玩笑。

听起来很认真

To have a tone of voice that is not joking.

语气不是在开玩笑。

变得严肃

To stop joking and adopt a serious manner.

停止开玩笑，采取严肃的态度。

保持严肃

To continue to not be joking.

继续不开玩笑。

保持严肃

To make an effort to continue to not be joking.

努力继续不开玩笑。

突然严肃起来

To suddenly stop joking and adopt a serious manner.

突然停止开玩笑，采取严肃的态度。

逐渐严肃起来

To gradually stop joking and adopt a serious manner.

逐渐停止开玩笑，采取严肃的态度。

对…来说是严重的

Indicates who or what is affected by the serious situation.

指明谁或什么受到了严重情况的影响。

对…是认真的

Genuinely intending to do something.

真心打算做某事。