| 单词 | occult blood |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔occult〕People in their sixties will be asked to send off a sample of their stools to be tested for traces of fecal occult blood.60多岁的人将被要求寄出一份自己的粪便样本, 以便检测是否有微量的粪便隐血。外研社新世纪 |
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