decreasing birthrate and aging population;  aging population combined with the diminishing number of children;  declining birthrate and a growing proportion of elderly people;  dwindling birthrate and an aging population;  low birthrate and longevity
 indicates sentence subject (occasionally object);  indicates possessive (esp. in literary expressions);  but;  however;  regardless of;  whether (or not)
 to advance;  to go forward;  to precede;  to go ahead (of);  to make progress;  to improve;  to deepen
 medium;  average;  moderation;  middle school;  China;  volume two (of three);  during (a certain time when one did or is doing something)
 at (place, time);  in;  to (direction, state);  toward;  for (purpose);  because of (reason);  for
 to put effort into;  to strain;  to put strength into;  to put forth effort
 indicates possessive;  nominalizes verbs and adjectives;  substitutes for "ga" in subordinate phrases;  (at sentence-end, falling tone) indicates a confident conclusion;  (at sentence-end) indicates emotional emphasis;  (at sentence-end, rising tone) indicates question
 indicates sentence topic;  indicates contrast with another option (stated or unstated);  adds emphasis
 of course;  certainly;  naturally
 important;  significant;  precious;  valuable;  careful
 thing;  matter;  incident;  occurrence;  circumstances;  situation;  work
 hope;  promise;  expectation;  anticipation;  side of a structural member
 indicates direct object of action;  indicates subject of causative expression;  indicates an area traversed;  indicates time (period) over which action takes place;  indicates point of departure or separation of action;  indicates object of desire, like, hate, etc.
 expectation;  anticipation;  hope;  promising;  rising;  up-and-coming
 only;  just;  merely;  as much as;  to the extent of;  enough to
 this;  last (couple of years, etc.);  these;  you (as in "you liar")
 country;  state;  region;  national government;  central government;  home (i.e. hometown, home country); (arch.)  province (of Japan)
 the future (usually distant);  future tense;  the world to come
 to be;  to exist;  to have;  to be located;  to be equipped with;  to happen
 hey;  you;  hey;  hey;  hold on;  yo
 how;  in what way;  how about
 to do;  to carry out;  to cause to become;  to make (into);  to serve as;  to act as;  to wear (clothes, a facial expression, etc.)
 good;  excellent;  sufficient;  enough;  profitable (deal, business offer, etc.);  beneficial
 if;  when;  and;  with;  used for quoting (thoughts, speech, etc.);  promoted pawn;  indicates a question
 nonexistent;  not being (there);  not having;  not
 in (of a ball, in tennis, etc.);  inside the line;  in;  inside;  enter here;  enter
 dispatch;  despatch;  transmission;  informing (e.g. of opinion);  sharing (thoughts, etc.);  telling
 to go;  to move (in a direction or towards a specific location);  to proceed;  to take place;  to pass through;  to come and go;  to walk
 to boast of;  to be proud of;  to take pride in
 technical prowess;  technical ability;  technical finesse;  technological prowess;  technological capabilities
 foreign;  abroad;  overseas
 to spread;  to propagate;  to popularize;  to broaden;  to extend;  to widen
 from now on;  after this;  in the future;  from here;  from this point
 in that way;  thus;  so;  so?
 to say;  to utter;  to name;  to call;  to go (e.g. "the alarm went ping");  to make a noise
 the world;  society;  sphere;  circle;  world-renowned;  world-famous
 consciousness;  becoming aware (of);  awareness;  mano-vijnana (mental consciousness, cognizer of sensory information)
 to become;  to get;  to result in;  to turn out;  to consist of;  to be composed of;  to be completed
 the expectation is that ...;  the reason is that ...;  the fact is that ...;  the explanation is that ...;  it is that ...