ob·ser·va·tion·al re·ˈsearch 名词
ob·ser·va·tion·al [ˌɒbzəˈveɪʃənəl, 美 ˌɑ:bzɚˈ-] 形 不变的
I. re·search 名词 [rɪˈsɜ:tʃ, 美 ˈri:sɜ:rtʃ]
1. research no pl (study):
2. research no pl (study of):
3. research (studies):
II. re·search 名词 [rɪˈsɜ:tʃ, 美 ˈri:sɜ:rtʃ] modifier
research (centre, programme, project, unit, work):
III. re·search 动词 不及物动词 [rɪˈsɜ:tʃ, 美 -ˈsɜ:rtʃ]
-
- etw erforschen [o. untersuchen]
IV. re·search 动词 trans [rɪˈsɜ:tʃ, 美 -ˈsɜ:rtʃ]
1. research 科:
-
- etw erforschen
2. research JOURN:
-
- etw recherchieren
| I | research |
|---|---|
| you | research |
| he/she/it | researches |
| we | research |
| you | research |
| they | research |
| I | researched |
|---|---|
| you | researched |
| he/she/it | researched |
| we | researched |
| you | researched |
| they | researched |
| I | have | researched |
|---|---|---|
| you | have | researched |
| he/she/it | has | researched |
| we | have | researched |
| you | have | researched |
| they | have | researched |
| I | had | researched |
|---|---|---|
| you | had | researched |
| he/she/it | had | researched |
| we | had | researched |
| you | had | researched |
| they | had | researched |
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单语范例（未经PONS编辑处理）
These books helped to create lasting public interest in observational astronomy.
en.wikipedia.org Researchers utilizing the observational method can exert varying amounts of control over the environment in which the observation takes place.
en.wikipedia.org In addition to these observational findings, there is also experimental evidence for social facilitation effects.
en.wikipedia.org The observational data from each side of a galaxy are generally averaged.
en.wikipedia.org Can the record provide an unambiguous date without making unwarranted assumptions about ancient astronomical observational methods?
en.wikipedia.org