hitherto-unknownCOCA³¹⁵¹¹¹⁺⁴BNC²³⁶²¹³⁺¹ 基本例句 🌏前所未有；迄今不为人知的；未知 In51 survivors and their descendants, they discovered a hitherto-unknown variant of PRNP, the gene which makes prions, the proteins that spread the disease. 他们在51位幸存者和他们的后代身上发现了一种目前为止无人发现的 PRNP变体。 PRNP是含有库鲁病传染源——朊病毒——一种蛋白质的源代码。 yeeyan