a Gordian knot
n.难解的结, 棘手的问题
热门单词
- a man of weight
- abreuvoir
- absorption of vibration
- abstinence syndrome
- accentuator
- accessions tax
- accident insurance
- accountancy general
- ACCW
- acetyl vanillin
- acetylene burner
- achievement
- achiral reagent
- achlorhydric anemia
- acid activation
- acid ammonium tartrate
- acid chrome blue R
- acid cleaner
- acid cooking
- acidity coefficient
- acidophile
