Through systematic research and reconstruction, sodium ion content in the desalting water was decreased.
通过系统的研究和改造，降低了除盐水中钠离子含量。
The current urgent task of speech study is to establish its theoretical framework through systematic research of speech study home and abroad.
当前应该对国内外言语研究进行全面系统的梳理，及早建立言语的语言学的理论框架。
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