memory; recollection; remembrance; storage
few decades; many decades; several decades
throughout; over a period of ...; over a span of ...
increase; multiplication; propagation; proliferation
again; once more; a second time
same; identical; equal; anyway; anyhow; in either case
encounter; being confronted with (e.g. difficulty); meeting with (e.g. accident)
time; hour; occasion; case; chance; opportunity
specialization; specialisation
force; unit; corps; squad; troops; party
at once; immediately; right away; directly (face, lead to, etc.); automatically (mean, result in, etc.)
destruction; disruption; (application) crash
the present; present time; as of; present tense; this world; this life
(United States of) America; USA; US
control; management (e.g. of a business)
prevention; precaution; protection against
everything; all; the whole; entirely; completely; wholly
young child; toddler; child over 1 but not yet of school age
to recommend (someone to do); to advise; to recommend (a book, someone for a position, etc.); to suggest; to offer (a drink, cigarette, seat, etc.)
vaccination; inoculation; immunization; immunisation
once; one time; one round; one game; one bout; one heat
to finish; to end; to merely result in something less severe than expected; to feel at ease; to feel unease or guilt for troubling someone; to be sorry
too; also; both A and B; A as well as B; even; as much as
and; besides; because; since; the thing is; for one thing
necessary; needed; essential; necessity; need; requirement
for example; for instance; e.g.
while; during (the time when)
counter for occurrences; a time; an instance; inning (baseball); round; episode; chapter
to perform; to do; to conduct oneself; to carry out
several years; a few years
once; one time; temporarily; for a moment; one degree; one tone
addition; supplement; appending; appendix
that being the case; because of ...; the reason is ...; given that ...
adult (esp. person 20 years old or over); grownup; becoming an adult; coming of age; growing up (to be a man, woman)
to cause; to induce; to bring about; to pull upright; to help up (e.g. a fallen person)
et cetera; etc.; or something; the likes of; for example; for instance
to die out; to peter out; to become extinct; to cease; to be stopped; to be discontinued
to raise; to raise up; to wake; to wake up; to cause; to bring about; to start