a sealed book
天书, 高深莫测的事物
热门单词
- Abercrombie's syndrome
- abrasion index
- abrasion test of lubricant
- abscessed
- absorption value
- abstract individual
- abstract norm
- abstract syntactics
- ac circuit
- ac-ac frequency converter
- acataphasia
- Acaulium
- accept an order
- acceptable quality limit
- acclimation
- accomplish
- accounting
- accumulative solution
- accumulator tray
- accuracy rating of instrument
- accusing
