calamity; disaster; misfortune
quite capable of ...; could happen; not unlikely to
greater than ...; bigger ...
complex; complicated; intricate; mixed (feelings)
many; much; majority (of); greater part (of); mostly; mainly
to need; to call for; to require
establishing; proving; ascertaining; identifying; confirming
law of conservation of energy
to apply (a rule); to be applicable; to come under (a category); to fulfill; to hold true
energy; energy; strength; energy source; energy resource; food energy
extinction; extinguishment; disappearance; annihilation
metre; meter; meter; gauge
impossible; unlikely; improbable
to train; to teach; to acquire (information); to learn; to stock; to stock up on
law of conservation of mass
mostly; ordinarily; probably; most; almost all; ordinary
taking over another's debt; shouldering someone else's burden; subrogation
was it?; I think it was ...; if I've got it right; (I, we) used to ...; I remember ...; it was ...
hollow; mid-air; air; sky
appearance; arrival; make one's appearance
true state; actual condition; reality
to pour (into); to sprinkle on (from above); to water (e.g. plants); to shed (tears); to concentrate one's energy (strength, attention, etc.) on; to devote to; to flow into (e.g. of a river)
weight; heavyweight boxer
I got it; I see; I now know; So that's the reason
principle; theory; fundamental truth
applying (e.g. a technology); adoption
this, that and the other; this and that
something; something or other; something something
to pour into (liquids); to pump into
to shed light; to cast light
without hesitation; with great optimism; (pushing or pulling) strongly; (drinking) heavily
to suck up; to absorb; to squeeze (money)
to go by; to go past; to run (between; of a rail service, bus route, etc.); to operate (between); to go indoors; to go into a room; to penetrate
emission (of light); radiation (of light); luminescence
on and after; as from; hereafter; thereafter; since
to produce; to yield; to cause; to result from; to arise; to be generated
circuit (electric); cycle (e.g. Krebs cycle)
indicates uncertainty or second hand nature of information quoted
(with a) thump; (hanging) straight down
motionlessly (e.g. stand, wait); (be) still; fixedly (e.g. gaze, stare); intently (e.g. listen, think); patiently (endure); stoically
slight movement; slight tremor; quiver