up to
adverb
uk/ˈʌp ˌtuː/us/ˈʌp ˌtuː/B1
used to say that something is less than orequalto but not more than astatedvalue,number, orlevel
接近于；至多
Up to two hundredpeoplewere onboardtheship.有将近200人搭乘了这艘船。
We canteachdancersup tointermediatelevelhere.我们这儿最高可以把舞蹈学员教到中级水平。
up to
preposition
uk/ˈʌp ˌtuː/us/ˈʌp ˌtuː/up topreposition(UNTIL)
B1(alsoup until)
until
直到
Up toyesterday, we had noideawhere thechildwas.直到昨天我们还不知道孩子的下落。
up topreposition(RESPONSIBILITY)
be up tosb
B1
to be theresponsibilityof someone
是（某人）的职责
It's up to themanagerto make thefinaldecision.这要由经理最后拍板。
up topreposition(DOING)
be up tosthB1informal
to be doing something, often somethingbadorillegal, usually secretly
（通常指偷偷地）正在做（常指坏事或不法之事）
She's up tono good(= doing somethingbadorforbidden)- you can alwaystellbecause shestaysin herroom.她没干什么好事——你总会看出来的，因为她老呆在房间里。
Helooksverysuspicioushangingaroundoutside- I'msurehe's up tosomething.他老在外面转悠，看上去很可疑——我敢肯定他正在干什么坏事。