chlorine log

例句：

1. 1. The chlorine log showsthe levels of chlorine in thewater.
   氯日志显示了水中的氯含量。
2. 2.The chlorine log was used tomonitor the water quality.
   氯日志被用来监测水质。
3. 3. The chlorine log was avaluable tool for monitoring the water quality.
   氯日志是监测水质的一个宝贵工具。