up(lower)approximation set

• 上（下）近似集

up(lower)approximation set的英文翻译是什么意思，词典释义与在线翻译：

英英释义

动词 up:

1. raise

形容词 up:

1. being or moving higher in position or greater in some value; being above a former position or level

2. out of bed

3. getting higher or more vigorous

4. extending or moving toward a higher place

5. (usually followed by `on' or `for') in readiness

6. open

7. (used of computers) operating properly

8. used up

副词 up:

1. spatially or metaphorically from a lower to a higher position

2. to a higher intensity

3. nearer to the speaker

4. to a more central or a more northerly place

5. to a later time