The nasal bone was absent in 43 of 59 (73%) trisomy 21 fetuses and in three of 603 (0.5%) fetuses with normal karyotype.是什么意思_The nasal bone was absent in 43 of 59 (73%) trisomy 21 fetuses and in three of 603 (0.5%) fetuses with normal karyotype.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句