| 词汇 | retrogradation |
| 释义 | retrogradation noun specializeduk /ˌret.rəʊ.ɡrəˈdeɪ.ʃən/ us /ˌret.roʊ.ɡrəˈdeɪ.ʃən/ [ C or U ] physics movement in a direction that is, or seems to be, the opposite to that of most other stars, planets, etc. : （天体的）逆行 The distance of any planet from the sun may be obtained from a measurement of the arc of retrogradation in a given time.任何行星到太阳的距离都可以通过测量给定时间内的逆行弧来获得。 The middle of the retrogradation always occurs when Saturn is nearly in opposition to the Sun.逆行的中间总是发生在土星几乎与太阳对冲时。 Add to that volcanic eruptions that coincide with the retrogradation of the sun, and we could get a global cooling. Because of the upcoming retrogradation of the sun around the barycentre, she says we can expect to encounter climatic extremes. In a systematic astronomy, retrogradations become part of the conceptual structure of the system. Astronomy albedo Andromeda Aquarius Aries asteroid galactic galaxy Gemini geostationary geosynchronous nova observatory orbit orbital Orion substellar sunspot supergiant supermassive supermoon [ U ] chemistry a reaction in which the structure of starch (= a white substance that exists in large amounts in, for example, potatoes and rice) changes when it cools after being cooked : （淀粉）回凝 Retrogradation is a reaction that takes place in gelatinized starch when the amylose and amylopectin chains realign themselves.当糊化淀粉内的直链和支链发生重排时就会出现回凝反应。 Bread kept in a refrigerator will develop mould growth more slowly than bread kept at room temperature, but will turn stale quickly due to retrogradation.和放在室温的面包相比，放在冰箱里的面包不容易发霉，但更容易因为淀粉回凝而变质。 As soon as bread is cooked and has cooled it begins to go stale. This is caused by a breakdown in the gel structure called retrogradation. When steamed Chinese manju are cooled or frozen, they often become hard due to retrogradation of gelatinized starch. Hardening or loss of flexibility of tortillas is believed to be due to a physico-chemical change in the starch constituent of tortillas which is known as retrogradation. Chemistry - general words acceptor aerosol aerosolize allotrope amphiprotic balanced equation chemical equation electrolyte endocrine disruptor endothermic epitaxial epitaxially epitaxy inorganic chemistry ionic bond nonchemical nonelectrolyte nonreactive preatomic reactive |
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