对钡铁氧体的水凝胶、醇凝胶以及气凝胶的红外光谱进行了研究。
The IR spectra of hydrogel, alcogel and aerogel of BaFe12O19 were studied.
在过去的很多年有很多研究给出了很多的建议，但事实上，每人每天对水的需求量取决于很多因素，包括您的健康状态、活动量以及生活环境。
Studies have produced varying recommendations over the years but in truth your water needs depend on many factors including your health how active you are and where you live.
在过去的很多年有很多研究给出了很多的建议，但事实上，每人每天对水的需求量取决于很多因素，包括您的健康状态、活动量以及生活环境。
Studies have produced varying recommendations over the years, but in truth, your water needs depend on many factors, including your health, how active you are and where you live.
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