Several experts said that the cost of developing an entirely new contraceptive method outweighed prospective profits, and that research financing from pharmaceutical companies had dried up.
有些专家说研究一个完全新型的避孕药的费用大于预期的利益，医药公司提供的研究经费已经基本耗尽。
Several experts said that the cost of developing an entirely new contraceptive method outweighed prospective profits, and that research financing from pharmaceutical companies had dried up.
有些专家说研究一个完全新型的避孕药的费用大于预期的利益，医药公司提供的研究经费已经基本耗尽。
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