即使管道供水系统在水源处是安全的。

Even if a piped water supply is safe at its source.

youdao

即使管道供水系统在水源处安全的，等水到达龙头时就不一定总是安全的了。

Even if a piped water supply is safe at its source, it is not always safe by the time it reaches the tap.

youdao

PPWSA的Chea Visoth回忆说当初供水到他的公寓的管道就是从路边公共供水系统的储水槽中引出来的。

Chea Visoth of the PPWSA recalls carrying water up to his flat from a roadside tank filled by a pipe illegally tapping the public system.

youdao