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来源:雅诚德英语网
The placenta also filters out many harmful substances that may be in the mother's bloodstream and could damage the fetus.
胎盘能过滤掉很多母亲血液中对胎儿有害的物质,但是它不能阻止所有的有害物质。
The placenta also filters out many harmful substances that may be in the mother's bloodstream and could damage the fetus.
胎盘能过滤掉很多母亲血液中对胎儿有害的物质,但是它不能阻止所有的有害物质。