MFM is an effective method to study magnetic domains and research magnetic materials.本文利用磁力显微镜研究纳米尺度磁畴的检测方法.Spacers make your child's inhaler easier to use and more effective.储药罐可以简化孩子用药,因此更为有效.Recent studies sugges...
上面有厚厚一层泡沫的一杯啤酒a glass of beer with a good head of foam上面有厚厚一层泡沫的一杯啤酒a glass of beer with thick froth on top台伯河已不再是漫溢平原的泛起泡沫的急流.The river Tiber was no longer a foaming torrent overflowing the plains....