to talk about; to speak of; to recite; to chant; to indicate; to show
background knowledge; prerequisite knowledge
(natural) satellite; moon; (artificial) satellite
originally; from the start; from the beginning; none the worse (for); (coming out) even; in the same position (as before)
to play a leading role; to play a central part
orbit; trajectory; (railroad) track; (right) track; proper course
maintaining a reasonable distance; keeping a proper distance; being neither too close nor too distant; taking a neutral position
to keep; to preserve; to hold; to last; to endure; to keep well (food)
faint-inducing; dizzying; overwhelming; mind-numbing; staggering
to rain incessantly; to downpour
border; boundary; turning point; watershed; area; region
change; variation; variety; diversity; inflection; declension
on and after; from ... onward; since
going around; orbiting; circling; circumference; girth; surroundings
though; although; notwithstanding; while; as; at the same time as
getting closer; drawing nearer; being not much different; being near (age, skill, etc.); becoming close (i.e. friendly); becoming intimate
to reach the point where ...; to come to ...; to come to be that ...; to start to ...; to begin to ...
unclear; obscure; unknown; unidentified; ignorance; lack of wisdom
consideration; guess; conjecture; judgement
future; (future) prospects; bringing (from abroad, another region, etc.); bringing about; giving rise to
becoming clear; coming to light; being ascertained; being identified; being confirmed
to avoid (physical contact with); to avoid (situation); to evade (question, subject); to ward off; to avert; to put aside
painful; being sorry; feeling sorry
decisively; decidedly; boldly; precisely; exactly
about; roughly; generally; on the whole; completely; quite
ten thousand years; eternity; perennial; perpetual
a little; a bit; a little while; a short time; a little way; a short distance
professor; teaching; instruction
ill-natured; mean; mischievous; nasty; unkind; teasing
mind; heart; spirit; the meaning of a phrase (riddle, etc.)
to repeat; to do over again
one's last moment; one's death; one's end
understanding; comprehension; appreciation; sympathy
beginning; outset; first; onset
skin; body (in the context of intimate bodily contact); surface; grain (e.g. of wood); disposition; temperament
white; blank (e.g. paper); uncolored; innocent; not guilty; (arch.) bright
at that time; at that moment; then; on that occasion
small; little; slight; below average (in degree, amount, etc.); low (e.g. sound); soft (e.g. voice)
(not) particularly; (not) especially; (not) specially; separately; apart; additionally
on good terms (with); on friendly terms (with); (getting along) well; in harmony; happily; peacefully
several years; a few years
strange; odd; peculiar; queer; curious
to meet (by chance); to come across; to meet (e.g. of rivers, highways, etc.); to emerge and engage (an enemy)