It has a clean administrative interface and seems easy to use.
它具有干净的管理界面，似乎很容易使用。
But it also has a second purpose-to keep the whole system clean.
另外它还有一个功能——保持整个系统的清洁。
It also has a cleaning and flushing system to keep the pipe clean.
该管道还自带清洗和冲水系统，来保持管道的干净。
Oh, it's quite obvious. The Pure Bright one is as clean as a new one, but the common one has already has stain on it.
哇，这很明显呀。超洁亮这款砖还是和新的一样，而那款普通抛光砖已经有污渍留在上面了。
It looks clean and smooth and has a good circulation and healthy complexion.
它看上去很干净柔滑并且又很好的循环系统和健康的肤色。
It looks clean and smooth and has a good circulation and healthy complexion.
它看上去很干净柔滑并且又很好的循环系统和健康的肤色。
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