美 [bi ʌp tu]
做某事或参与某事（通常是一些恶作剧或不恰当的事情）：取决于，是选择的。
... be taken by 被迷住，被吓住 be up to 由...做；胜任，从事于 beaded 以珠装饰的，珠状的 ...
... as well as也，又 come true实现，达到 be up to胜任，适于 ...
... be content with对......感到满意 be up to应由......，轮到...... be meant／intended for打算给，打算用作 ...
... be through with 完成 be up to 胜任，能做（工作、任务等）；忙于，从事于，正在做；取决于 bear up well （在困境中）忍耐，泰然来源： ...
I'll be up to see you tomorrow.
我明天上来看你。
It's very quiet upstairs; they must be up to some mischief !
楼上很安静。他们一定在搞什么恶作剧。
"Strange," I thought."They must be up to something!"
“奇怪，”我想。“他们一定在搞什么鬼！”
U.S.Army Sergeant Jeremy Tormala, on his second tour of duty in Iraq, thought the elections gave a good indication that Iraqi forces will be up to the task.
VOA : standard.2010.03.08
Even though you'll see a whole bunch of constructs today and even throughout the course, you will find that there's often multiple ways to implement something, and it will be up to us to guide you toward better design and making in giving two different options the better choice as time passes.
即使今天乃至整个课程中,你们将了解到很多的结构，你将发现,这里有很多的方法来处理一些事情，这将引导你们做更好的设计,随着时间的推移，从两个不同的选择中,选择一个更好的。
计算机科学课程节选 : 哈佛公开课
but they won't be academically, kind of, up to par. They won't be up to snuff academically.
但是他们成绩上，有些，不达标。他们成绩上不行。
SpeakingMax英语口语达人 : 对于赞助入学的看法
He says they might be trying to increase their dopamine levels to make up for the deficits in their reward system.
VOA : special.2009.09.16
He says they might be attempting to increase their dopamine levels to make up for the deficits in their reward system.
VOA : special.2009.09.29
Jesuits, by tradition, are schooled in both so Pope Francis will be up to the job.
The fashion-plate 44th President will be up to his ears in the financial crisis.
Which makes it sound as if he will not be up to the job.