Detectable only by microscopic examination or chemical analysis, as a minute blood sample.
Detectable only by microscopic examination or chemical analysis, as a minute blood sample.
通过显微镜观察测知的只能通过显微镜观察或化学分析才能发现的，如微量的血样
Detectable only by microscopic examination or chemical analysis, as a minute blood sample.
通过显微镜观察测知的只能通过显微镜观察或化学分析才能发现的，如微量的血样