单词	optical slide rule
释义	optical slide rule 光学计算尺
随便看	balance of the account balance of the fiscal system balance of the national economy balance of the order Balance of the purchase price balance of the tax payable balance of threat balance of torpedo balance of total military strength balance oil cylinder balance oil hole Balance oily skin massage oil balance on balance on account balance on account balance balance on capital account balance on current account balance on current account and longterm capital balance of trade balance-of-trade balance of trade account balance of trade allied invisibles balance of trade deficit Balance of trade in services balance of trade surplus