没有限制的

There are no hard and fast rules about the use of hyphens in English.

对于连字符号的使用, 英语中没有严格的限制。

Several dioramas were presented as well, since there was no restriction on the method of presenting the models.

提出了若干西洋镜以及，因为没有任何限制的法，介绍了模型。