optional part造句怎么写

If you decide later to add more optional parts, download the additional optional parts and rerun the extraction tool prior to attempting the installation.

Again, the return messages are an optional part of a sequence diagram.

The service provider catalog is an optional part of the service discovery process.

Some pair programmers regard rotation as an optional part of the practice, and on a small team, or with few programmers willing to pair, there might be little alternative.