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| 环圈开口处 | |||
| 开环作用 | |||
| 开环 | |||
| 断开环路 | |||
| 解环 | |||
| 环开裂 | |||
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| 开环 | |||
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ring opening : 23 phrases in 8 subjects |
| Chemistry | 2 |
| Genetics | 1 |
| Oil / petroleum | 3 |
| Plastics | 2 |
| Polymers | 11 |
| Reproductive biology | 1 |
| Space | 1 |
| Technology | 2 |
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