As for the composition of size, there is no essential distinctions between Chinese and West Europen loesses. But, the loess sizes on different layers in West Europe show regular variation.
在粒度组成上，欧亚黄土并没有本质的差别，但西欧不同层位的黄土粒度组成呈有规律变化。
Results: different mineralized layers in different period of development appeared different color variation in the dental germs.
结果：在牙胚矿化过程中，不同时期、不同矿化层呈现不同的颜色变化。
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