Khmer script follows complex rules of layout in which consonants may take two different forms (e.g., the small form is placed on a lower line if it immediately follows another consonant).

• 库美尔文字的排列规则比较复杂，辅音可以有两种形式（例如，当辅音紧跟另一个辅音时，采用小写形式写在较低处）。