1.about time 是时候了
It's about time you buy a new phone!
是时候你去买个新手机了!

2.(to)act one's age 像点样儿,做出与年龄相符的行为
Ben, stop playing with rocks, act your age!
别在那儿玩石头了行不,你都多大了!
3. at each other's throats 吵来吵去/激烈争吵
It was really bad, they were at each other's throats
情况很糟糕,他们吵的特别凶
4. armed to the teeth 全副武装
The rebels were armed to the teeth, we should be careful this time.
那些叛军已经全副武装了,我们要小心
5. at this stage 此时此刻
At this stage, we can't just give it up.
此时此刻,我们不应就此放弃
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