同时存在

With the quincunx as well, it can be difficult to merge the energies of the planets involved.

她觉得两者的角色不能同时存在，而同时间要做两个这样的角色会令她不舒服。

The evolvement from orderless to ordered and the degenerate from orderless to ordered are exiting synchronously in the nature.

自然界存在着无序到有序的进化，同时也存在有序到无序的退化。