中文汉字是用于书写系统的表意文字。

Chinese ___characters are logograms used in writing systems.

然而，这些诗是用难以理解的古日文字符写成的。

However, the poems are written in old Japanese ___characters which are difficult to understand.

在数字编码中，每个字符对应一个特定的字节序列。

In digital encoding, each ___character corresponds to a specific byte sequence.