to be a condition or requirement that is uncertain or potentially challenging to fulfill

很大的变数, 一个大问号
这个计划听起来不错,但投资人会不会同意还是一个大问号。
a story that seems impossible, particularly one that is used as an excuse

荒唐借口, 离谱故事
别拿这种离谱故事糊弄我,直接说到底发生了什么。
used to express anger and the fact that someone does not care about someone or something

去他的吧, 我才不管
他们想让我整个周末免费加班?去他的吧。
used to say that one does not think that something will ever happen or has any chance of being true

绝不可能, 想都别想
她说明天会准时到,但这绝不可能。
to think about unlikely and unrealistic possibilities

做不切实际的梦, 痴心妄想
用这点预算买豪宅,完全是不切实际的幻想。
used to refer to something that exceeds one's expectations in such ways that makes it hard to believe

好得不像真的, 像做梦一样
她说那套公寓便宜、位置市中心、还刚翻新过,我觉得好得不像真的。
an attempt made without having any high hopes of achieving success

希望渺茫的尝试, 碰运气
机会很渺茫,但我还是给编辑发了邮件,问她愿不愿意看我的文章。
used to refer to something that is extremely desirable yet nearly impossible to obtain

遥不可及的梦想, 可望不可即的目标
在城里拥有一套房子,已经成了大多数家庭遥不可及的梦想。
a promise of something good or desirable that will never be fulfilled

空头承诺, 画饼
部长的讲话满是空头承诺,却没有给眼下艰难度日的人提供任何帮助。
to aim for goals that are unrealistic or extremely difficult to achieve

目标定得太高, 挑战几乎不可能的目标
这家初创公司想同时和三家全球巨头竞争,目标定得太高了。
used to express one's disbelief about something happening or being true

想得美, 门儿都没有
她答应明天还钱,想得美。
an impractical or impossible idea, plan, or wish

白日梦, 空想
很多年来,在城里买房都像是白日梦。
the slightest chance of succeeding or happening

一丝机会, 微乎其微的希望
我知道自己连一丝机会都没有,但还是申请了那份工作。
to make promises that are impossible to be fulfilled or be kept

许下不可能兑现的承诺, 开空头支票
那家代理公司给我们许下各种空头承诺,最后的宣传却很普通,还交晚了。
to have no desire or intention to return to past circumstances

毫不留恋地往前走, 不再怀念过去
他辞掉那份糟心的工作后,一点也没后悔。