| 例句 |
He exceeded the speed limit once too often and was fined.他多次超速开车未被发现，这次可被罚了款。Some scientists estimate that at least one third of the life forms that exist in deep oceans have not yet been discovered.有些科学家估计，深海中至少有三分之一的生物尚未被发现。But for all the cancers that are caught by doctors, many still slip through.除了医生诊断出来的癌症，还有许多未被发现。The tumor was/went/remained undetected for years.这个肿瘤多年来未被发现。 |