什么是斜线命令？
slash commands are a common feature of chat messaging and collaboration tools. by simply typing “/” in the chat box, users can see a list of all automated actions (commands) that bots can complete. common slash commands include creating polls, starting calls, updating status, creating posts, or setting reminders.
in most cases, yes  though that will depend on the specific solution. to invite external participants, you’ll be able to email them a link to your workspace. note that external users will often have to download an app in order to access your workspaces.