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Sewerage systems are either'separate'or'combined '.是什么意思？

Sewerage systems are either'separate'or'combined '.

排水系统有 “ 分流制 ” 和 “ 合流制”.

相关词汇
sewerage systems are combined

sewerage

n. 污物处理（系统）；

systems

n. [物理化学]系( system的名词复数 )，制度，身体，系统；

are

vi. （用于第二人称单复数现在时，第一、三人称复数现在时）是；n. 公亩（等于100平方米）；

combined

adj. 结合的，<化>化合的，[数]组合的；v. （使）联合(combine的过去式和过去分词)；
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他当众承认自己可能犯了个错误。
...the spiralling vortex airflow that slows the plane.
使飞机减速的螺旋形气流涡旋
You just go on ahead. I'll come by later...
你只管先往前走。我随后就来。
He who spares his rod hates his son, But he who loves him chastens him early.
24不忍用杖打儿子的,是恨恶他;疼爱儿子的, 趁早管教.
For further information, please contact 414 3925, extension 2253.
详情请致电414 3925,转分机2253。
He sat there while I made the case for his dismissal...
他坐在那儿，听我陈述解雇他的理由。
Baroness Thatcher's claims seem credible to many.
撒切尔女男爵的主张在很多人看来是可信的。
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一份耕耘，一份收获。
This decree obliges unions to delay strikes.
该法令迫使工会推迟罢工。
The right to demand payment from the endorser of a commercial paper when the first party liable fails to pay.
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他微微皱了下眉头，显然并不期待任何人回答他的反问。
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早先有关枪击的那些报道尚未得到证实。
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旅行者的四周到处潜伏着危险.
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大车在钢琴的重压下嘎吱作响.