基本解释死胎英汉例句雙語例句Conclusion: The infection of human parvovirus B19 exists in the pregnant women in Zhengzhou, which may explain the unidentified reason abortion or stillborn foetus.結論：鄭州市孕婦中存在人微小病毒B19的感染，可能導致不明原因流産或死胎。