不准

He was uncertain about his brother's intentions.

他拿不准他哥哥的意图是什么。

He wasn't at all sure Sarah was up to that.

他一点都拿不准萨拉能否胜任。

It's not certain they'll accept the Front's candidate if he wins.

即便来自阵线的候选人获胜，他们能否接受他还说不准。

The trains are notoriously unreliable.

火车不准点是出了名的。

Children unaccompanied by an adult will not be admitted.

儿童无成年人陪伴着不准入场.

Just when this will happen is anyone's guess.

谁也说不准这事什么时候会发生。

He's been taken to task for his habitual lack of punctuality.

他因为经常不准时而受到批评.

Foreign aid workers will not be allowed into the stricken areas.

国外救援人员不准进入灾区。

He forbade them from mentioning the subject again.

他不准他们再提到这个问题。

Armstrong is uncertain where his long-term future lies.

阿姆斯特朗拿不准自己的人生远景在何方。

There's no telling how long the talks could drag on.

谁也说不准谈判还会拖多久。

Scientists are becoming increasingly unsure of the validity of this technique.

科学家们越来越拿不准这一技术是否正当合法。

You do not hit my grandchildren, do you understand?

你不准打我的孙子孙女，明白吗？

Allen, don't you dare go anywhere else, you hear?

艾伦，其他地方哪儿都不准去，听到了吗？

Keep your hands off my milk.

不准打我的牛奶的主意。