You can insert regular expressions into your glossary to enable source terms that span non-translatables (like numbers). The non-translatables will be inserted (adapted) into the target term automatically. By using regular expressions in source terms, you can take auto-assembling to an even higher level. Though regular expressions introduce a degree of flexibility, their result in the auto-assembling process is completely predictable, thus avoiding all fuzziness.
PLEASE NOTE: If you want to add entries to your glossaries that start with a number, you will have to use regular expressions.