• fixed ⪢⪢
http://qindex.info/i.php?x=27050

○○○ 5.1.1 Definition⎾f(x)⏐x￫∞⏌= L ⪢⪢
Let f:A￫R be a function whose domain A contains the interval [a,∞) for some fixed real value of a. Then f(x) tends to L as x tends to infinity, if for every ε>0 there exists a real number X such that x>X ⇒ ⎹f(x)−L⎸<ε.
http://qindex.info/i.php?x=5002

• Three Ways to Express Future Events
(1) present continuous: Emphasizes the present effect of the future event. Fixed plans. (2) be going to: Emphasizes the intention. Plans made in the past. (3) present simple: Future event based on a schedule or timetable. Used in subordinate clauses.
http://qindex.info/i.php?x=4068

• Introduction to Minerals
○ 5 citeria: solid, naturally occurring, inorganic, fixed chemical formula, specific atomic arrangement -- igneous, granite, speckle, quartz, biotite mica, plagioclase feldspar, fluorite, talc, selenite gypsum, pyrite, silicate, bituminous, sulfur, halite
http://qindex.info/i.php?x=4013

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