母体微量营养素补充的安全性、功效和有效传递需要进一步研究。
The safety, efficacy and effective delivery of maternal micronutrient supplementation require further research.
然而，另一个可能的解释包括反应产生的抗体从母体通过胎盘传递到胎儿。
However, another possible explanation involves the transfer of reactive antibodies from the mother through the placenta to the fetus.
建立一个理论模型来模拟致动器和母体之间的动态载荷传递以及产生的弹性波传播。
A theoretical model is developed to simulate the dynamic load transfer between the actuators and the host medium and the resulting elastic wave propagation.
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