a hard nut to crack
棘手的问题
热门单词
- abandonment of husband
- absolute temperature
- abstractg of title
- acceding state
- accelerated rate of depreciation
- acceptance corporation
- access authority
- acclimate
- accounts of source of funds
- accrued expenses
- accumulation disease
- accumulative legacy
- acedapsone
- acelosis
- aceratosis
- acetocyclopropane
- acetonyl benzyl hydroxycoumarin
- acetyl-salicylic acid
- acetylbenzoate
- acetylenic bond
- acetylhydroperoxide
