在数学中，实数包括有理数和无理数。
MyCidian is a free, web-based Chinese-English dictionary.
I wanted one place with everything I needed to learn Chinese — definitions, pronunciation, stroke order, examples — instead of juggling tabs across half a dozen sites, each good at one thing. No such place existed, so I built it.
It's free and staying that way. Web only, with no app planned. Ad-free for now; if that ever changes, signing in will remove them.
No questions here yet — this page is waiting on content.
Still stuck? Get in touch.
Check the FAQ first — your question may already be answered there.
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Registration is invite-only while the site is in development, so you'll need a signup code. Email sign-up is coming soon.
New accounts are closed right now. If you already have one, sign in above.
There's no password reset, so a forgotten password means the account can't be recovered. Keep a copy of your words.