| 词汇 | undulation |
| 释义 | undulation noun[ C or U ] uk /ˌʌn.djʊˈleɪ.ʃən/ us /ˌʌn.djʊˈleɪ.ʃən/ a continuous up and down shape or movement, like waves on the sea: 波动，起伏;（声音）忽高忽低;（音量）忽大忽小;（节奏）忽快忽慢 The fields rise and fall in gentle undulations.田野地势平缓，略有起伏。 Patterns and shapes amorphous arabesque argyle asymmetrically asymmetry fishhook flecked formless formlessly fretted saltire scalloped scissor semilunaris shapeable wavery wavily weave willow pattern zigzag You can also find related words, phrases, and synonyms in the topics: Raising and lowering Examples of undulationundulation The wave motion is then manifested by undulations of surfaces of constant density within the fluid. Individual frequencies that are mixed together in order to create sonic masses follow reciprocal types of motion, including undulations, surges, swirls, drifts and dips. I was especially anxious to avoid the monochrome effect of continual crooning undulations. They envisioned a periodic alongshore current flowing over undulations in the continental shelf. In lateral undulation, each link of the mobile mechanism faithfully follows the path taken by the leading link. While the front steepens, the effect of frequency dispersion (or vertical acceleration) becomesincreasingly appreciable, which may lead to the development of undulations behind each crest. At the onset of instability the unsteadiness is observable as a mere undulation of the two threads of dye of the bifid wake described above. This is the starting point of the analogy between grasping and lateral undulation. The country is a plain of loose red sand and has very broad, gentle undulations about 20 miles wide. Oscillation and undulation, which are contour variations, could apply to internal, textural motions, as well as being descriptions of external contour. These undulations may be signatures of naturally occurring structures, but contribute nothing to the ensemble average because they occur randomly in space and time. The normal solution of (3.4) and (3.5) is then slightly perturbed to see if imposed bed undulations will grow or die. Irregular undulations of the surface became more pronounced over the drying time. The minimal number of required simultaneous lateral contacts is known to be 3 for snakes exercising lateral undulation. Only if the water surface amplitude v0 turns out to be real also, will the surface undulation be in phase with the bed wave. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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