The change of ammonia nitrogen concn . in the waterbody had no significant difference from that of the control group.

对于水体中氨氮的浓度，罗非鱼的影响则不明显。

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The change of ammonia nitrogen concn . in the waterbody had no significant difference from that of the control group.

对于水体中氨氮的浓度，罗非鱼的影响则不明显。

youdao