ascii subset造句

For keys, an ASCII subset ( control characters from 0x00 to 0x1f are not allowed ) must be used.
It can be up to four times the size of UTF-8 depending on how many of the characters are in the ASCII subset.
UTF-16 and UTF-32 are incompatible with ASCII files, and thus require Unicode-aware programs to display, print and manipulate them, even if the file is known to contain only characters in the ASCII subset.
The 7-bit ASCII subset for the Japanese version is non-standard : it supplies a Yen symbol where the backslash character is normally found, and left and right arrow symbols in place of tilde and the rub-out character.
It's difficult to find ascii subset in a sentence. 用ascii subset造句挺难的