• vi. 起伏，波动；震动；呈波浪形
• vt. 波动；使波动；使起伏；使成波浪形
• adj. 波动的；起伏的；波浪形的

来自拉丁语unda, 水，水波，词源同abound,inundation,water, 字母w脱落。

undulate

undulate: [17] Undulate goes back ultimately to Latin unda ‘wave’, source also of English inundate [17], redundant, and surround. This in turn was descended from the Indo-European base *ud-, which also produced Greek húdōr ‘water’ (source of the English prefix hydro-), and variants of which lie behind English vodka, water, and wet.
=> abound, inundate, redundant, sound, surround

undulate (v.)

"to move in waves," 1660s, back-formation from undulation. Related: undulated, undulating.

1. As we travel south, the countryside begins to undulate as the rolling hills sweep down to the riverbanks.

我们一路南行，乡间开始变得起伏不平，绵延的山峦一直延伸到河岸。

来自柯林斯例句

2. To undulate more freely, keep you hands about shoulder width apart.

要波动的更自由些, 保持你的手与肩膀同宽.

来自互联网

3. The species is characterized by its long and lanceolate leaflets with undulate teeth.

本种以它的长和披针形的小叶具波状的齿为特点.

来自互联网

4. Put forward disposal idea and prevent measurement for quality abnormity undulate appears in entire produce process.

对生产全过程出现的质量异常波动提出处理意见和预防纠正措施.

来自互联网

5. The way of reckoning for power supply now, makes the linerate undulate greatly at different period.

目前的供售电结算方式, 使供售电量不同期,线损率大幅波动.

来自互联网