al·ter·na·tion 
(ôl′tər-nāshən, ăl′-)
(ôl′tər-nāshən, ăl′-)n.
Successive change from one thing or state to another and back again.
| 单词 | alternation |
| 释义 | al·ter·na·tion (ôl′tər-nāshən, ăl′-)n. Successive change from one thing or state to another and back again. |
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