be up on中文什么意思

精通, 熟悉

• up:    adv. (superl. uppe ...
• be up:    时间到了; （时间等）到了，结束了; ...
• be up to:    该由…负责，在于…，取决于; 胜任, ...

例句与用法

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1. He is up on current events .
   他对时事很熟悉。
2. More prominent than other mammaries have been up on the screen
   比银幕上已经出现过的那些乳房显眼？
3. Giver who might not be up on
   Apurva shree帮助人在怎样
4. You were up on that step stool
   你站在梯凳上
5. You were up on that step stool
   你站在梯凳上