| 单词 | undulate |
|---|---|
| 音标 | ['ʌndjuleit] |
| 解释 | v. 波动，起伏 |
| 红宝书 | 【英】 v.波动，起伏 (to form or move in waves；fluctuate) 【记】 undu(波浪)+ulate→ 波动，起伏 【例】 a field of wheat undulating in the breeze |
| 字源 | undulate (v.) "to move in waves," 1660s, back-formation from undulation. Related: undulated, undulating. |
| 不择手段背单词 | v. 波动起伏; 使成波浪形 【记】und波浪, ulate－波动起伏 【参】abundant(adj 丰富的)中间的und形容麦浪滚滚. |
| 趣味全助记 | 【记】fluctuate 波动 看成是flu- 流水 + undulate |
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