变革的理论存在已久。

Theories about change had long existed.

youdao

这些创意烹调法中，有些早就存在已久。

Some of these creative cooking methods have been around for a long, long time.

youdao

对这种差异的怀疑存在已久，但是从未被证实过。

Such differences had long been suspected but never proven.

youdao

一个存在已久的计划——在孟买建造第二个国际机场——被搁置。

A long-standing plan to build a second international airport in Mumbai is on ice.

youdao

油井的存在由来已久。

The existence of oil Wells has been known for a long time.

youdao

所使用的药品由来已久，存在着危险和不便之处。

The drugs are old, dangerous, and cumbersome.

youdao

所使用的药品由来已久，存在着危险和不便之处。

The drugs are old, dangerous, and cumbersome.

youdao