The apple is taken away after their seed is no longer extractable.当再也榨不出子来时,苹果就被拿走了.The gold in the oceans is too diffuse to be extractable at a profit.但海洋中的黄金太分散,提炼赚不了钱....
The nature of the polymer is currently a trade secret.这一聚合物的性质目前是个商业机密。He's accused of misusing $17.5 million from a secret government slush fund.他被指控滥用秘密的政府行贿基金，金额达1,750万美元。The exact locations are being kept secret...