A new method of tracing precipitation isoline is introduced in term of the character of rain spot and isoline.
针对雨量站点及等雨量线的特征，讨论了一种新的等雨量线追踪途径。
Acid rain, as one of the major environmental problems man is confronted with, is becoming a hot spot in the study of soil science and ecology.
酸雨是人类当前面临的最严重的环境问题之一，并日益成为土壤学和生态学研究的热点。
Acid rain, as one of the major environmental problems man is confronted with, is becoming a hot spot in the study of soil science and ecology.
酸雨是人类当前面临的最严重的环境问题之一，并日益成为土壤学和生态学研究的热点。
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