Only in large cities的意思|示意

Today in most large cities, water is used only once and then sent out into a sewer system.

今天在大多数的大城市里，水仅仅被用过一次，之后就被送到了下水道。

Today, in most large cities, water is used only once and then discharged into a sewer system.

今天，在大多数大城市，水是仅使用一次，然后排入下水道系统。

Large-scale vertical farms, like the "Type O2" design seen here, are still only theoretical, but certain cities have expressed a serious interest in making them a reality.

大规模的纵向农场，比如图示的"Type O2" 设计，仍旧是理论阶段，但一些城市已经表示出将理论变为现实的强烈兴趣。

Today, in most large cities, water is used only once and then runs to the sea or rivers. But it can be used again.

今天，在有很多的大城市里，使用过的水直接就流到海或河里了。但是，它是可以被再利用的。

Only some really large schools in big cities have uniforms.

只有在大城市里的真正大点的学校，他们才有校服。

As the businessman association, the Chambers of commerce were not only set up in large and medium sized cities everywhere, but began to breed in country towns.

作为近代商人社团的商会，不仅在各大中城市普遍创建，而且在乡村市镇也广泛渗透。