1.
Undulating hills were changed to valleys,
起伏的波峰变成波谷，
2.
A minimum point in a wave or an alternating signal.
波谷波或交错信号的最低点
3.
As the wave bore down on us, the trough deepened.
当波涛向我们压来时, 波谷加深了。
4.
The distance between one peak or crest of a wave of light, heat, or other energy and the next corresponding peak or crest.
波长光、热或其它能量波的一个波峰或波谷与下一个对应的波峰或波谷之间的距离
5.
Their growth results from material being scoured from the trough regions and deposited over the crests.
他们的生长是由波谷冲刷和波峰淤积而引起的。
6.
Where a trough and crest coincide we get the total amplitude zero.
在波峰与波谷重合之处，总振幅实际上为零。
7.
The ice cap is cut by deep troughs and chasms;
冰冠被深深的波谷和坑洞所切开；
8.
The number of wave crests and wave troughs of the flame varies regularly with the change of frequences of incoming waves.
火苗的波峰和波谷数目随入射声波的频率改变而有规律的变化。
9.
A particular peak or trough of the waveform can be picked to this accuracy, perhaps.
也许，波形中特殊的波峰或波谷能够以这个准确度选
10.
The sailor dislikes to have his ship get into the trough of the sea.
海员很不愿意让船只陷入海浪的波谷之中。
11.
A hill or dale in undulating country.
山谷位于波状起伏山区的山或谷
12.
Kidepo Valley National Park
基代波河谷国家动物园
13.
A long, narrow depression, as between waves or ridges.
槽、谷波浪或山脊间长而窄的凹洼
14.
There is a valley between two mountains and there is a trough between two waves.
两山之间有一谷，西波之间有一伏。
15.
Energy Efficiency in Microwave Drying of Rough and Brown Rice
微波干燥稻谷和糙米的能量效率(英文)
16.
Scattering of P and SV Waves by Alluvial Valleys with Saturated Soil Deposits;
饱和沉积河谷对平面P和SV波的散射
17.
Bourbon is distilled primarily from what grain?
美国波本威士忌主要是由什么谷物蒸馏而成的？
18.
THE RIFF WAVY-STRUCTURAL EVOLUTION OF THE ZHONGTIAOSHAN MOUNTAINS AREA IN THE LATE ARCHEOZOIC ERA-EARLY PROTEROZOIC ERA
中条山晚太古—早元古裂谷波浪状构造演化