• certain ⪢⪢
If you are _____ about something, you know it is true.
http://qindex.info/i.php?x=14032

• certain ⪢⪢
I'm _____ that zebras have stripes.
http://qindex.info/i.php?x=14051

◎◎◎ treat ⪢⪢
To _____ is to act in a certain way toward someone.
http://qindex.info/i.php?x=20438

◎◎◎ among ⪢⪢
If you are _____ certain things, they are all around you.
http://qindex.info/i.php?x=10094

◎◎◎ typical ⪢⪢
If something is typical, it is normal for a certain type of thing.
http://qindex.info/i.php?x=12991

◎◎◎ currency ⪢⪢
Currency is the form of money used in a certain place.
http://qindex.info/i.php?x=12372

◎◎◎ brainstorm ⪢⪢
To brainstorm is to have a lot of ideas about a certain topic.
http://qindex.info/i.php?x=12051

◎◎◎ native ⪢⪢
If something is native, it is originating in a certain place or area.
http://qindex.info/i.php?x=13228

○○○ influencer ⪢⪢
A social media influencer is a person who gets paid to promote certain products or services to their follower base on media platforms like Facebook, Instagram, Twitter, YouTube and so on.
http://qindex.info/i.php?x=6592

○○○ dissolve ⪢⪢
This acid allows it to slowly _____ certain kinds of rock like limestone, marble or gypsum.
http://qindex.info/i.php?x=16430

○○○ in his eyes a flaming glow ⪢⪢
There lived a certain man in Russia long ago He was big and strong, _____ Most people looked at him with terror and with fear But to Moscow chicks he was such a lovely dear #lyrics
http://qindex.info/i.php?x=27716

• prime number theorem
○ Around 300 BC Euclid proved there were infinite number of prime numbers. ○ The number of prime numbers less than a certain natural number is asymptotically equivalent to x/(x⍻e).
http://qindex.info/i.php?x=3779

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