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| explore a question; study the issue (Franka_LV); go deeply, closely into a question (into the matter, into the subject, into the evidence, into smb.'s statements, etc., и т.д.) | |||
| explore a problem | |||
| enquire into a question; inquire into a question; investigate a question | |||
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| see into a matter | |||
| изучить вопрос: 21 phrases in 6 subjects |
| American usage, not spelling | 1 |
| Formal | 1 |
| General | 11 |
| Informal | 1 |
| Makarov | 6 |
| Scientific | 1 |