1. 层阴在线翻译
1. 层阴沓至，早夜的初昏正在渗入左邻右舍。
The first of night was seeping into the neighborhood, shadow by shadow.
2. 天然雨水下，泥岩盖层阴、阳离子浓度均降低，并随时间趋于稳定，灰岩与泥岩略有差别；
In rain water, the concentration of both cation and anion in mud rock decreased until tranquilization, and the trend are different between mud and carbonate rocks.