会发光的欧巴i
变异=variation名词;
<<动词: vary=These apples vary in size from small to medium.>>
variation名词:
2. an instance of this: a variation in quality.
3. amount of change: a temperature variation of 20°.
4. Every day without variationmy grandfather ate a plate of ham.
5. This delicious variation on anomelette is easy to prepare.
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