a blue moon
n.不可能的事
热门单词
- ability distribution
- able-bodied seaman
- abortion statistics
- abradum
- absolute homogeneity
- absorption of vibration
- Abyssinian
- academically
- acantha
- accelerated schedule
- accident prevention instruction
- accounting cost
- accumulative ledger
- acetaldoxime
- acetolysis
- acetylene welder
- achieve
- Achillean
- acid blow case
- acid dew point corrosion
- acid smell
