...碱性环境；溶液侵蚀 [gap=1499]s: geotechnical engineering; polluted soil; physical and mechanical properties; alkaline environment; solution erosion ...
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Or cold environment, acidic or alkaline environment.
或者高寒环境，酸性或者碱性环境等。
The experiments show that aeration and the alkaline environment are needed.
试验证明，曝气和碱性环境是必不可少的两个条件。
For example, in the alkaline environment, change of fiber ball filter service life will be shortened;
例如，在碱性环境下，改性纤维球滤料的使用寿命会大大缩短；
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