up to

介词 prep.
中文释义
英 /ˈʌp tuː/|/ˈʌp tə/    美 /ˈʌp tə/

英文释义

介词 prep.
  1. Used other than figuratively or idiomatically: see up, to.
    — She went up to the third floor.
  2. Capable, ready or equipped, having sufficient material preconditions for, possibly willpower (at a particular moment).
    — to feel up to it
  3. Capable, ready or equipped, having sufficient material preconditions for, possibly willpower (at a particular moment).; Willing, interested in
    — Are you up to going to the beach?
  4. As much as; no more than (also with of).
    — You can make up to five copies.
  5. Until.
    — Up to that point, I liked her.
  6. Within the responsibility of, to be attributed to the sphere of influence of, having someone or something as authoritative in.
    — It’s up to you whether to get the blue one or the red one.
  7. Doing, involved in.
    — to be up to
  8. Doing, involved in.; Devising, scheming (planning something mischievous or inappropriate).
    — He looked like a man up to no good.
  9. Considering all members of an equivalence class the same.
    — There’s only one rooted tree with two leaves, up to ordering.
  10. Familiar with the meaning of; able to understand. archaic,slang
    — “Oh,” said Mr. Pickwick. “My what, did you say?” “Your chummage ticket,” replied Mr. Roker; “you’re up to that?” “Not quite,” replied Mr. Pickwick, with a smile. “Why,” said Mr. Roker, “it’s as plain as Salisbury. You’ll have a chummage ticket upon twenty-seven in the third, and them as is in the room will be your chums.”
  11. Taught by; in the class of.
    — I was up to Mr. Wayte, and, although he was a fairly easy and by no means strict master, […]

词源

From Middle English up to, from Old English up tō.
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