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| two-level action; two-position action; two-step action | |||
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两级动作 : 5 phrases in 2 subjects |
| Electronics | 2 |
| Technology | 3 |
The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Add | The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Report an error
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