explanation; commentary; exposition; elucidation
entry; approach; penetration
revolution; rotation; turning; turning (an aircraft or ship)
stretching; extension; elongation
front and rear; front and back; before and after; around; about; order; context
to impose (a tax, fine, etc.); to levy; to assign (a task, duty, etc.); to give; to set
interplanetary cruise; planetary travel
least; lowest; worst; awful; horrible; at the very least
to cross over; to cross; to pass through; to exceed; to surpass; to be more (than)
as a rule; in general; in principle; basically; essentially; fundamentally
100,000; hundred thousand
to distance oneself (from); to keep (something or someone) at a distance; to maintain a distance (from)
double track; two-track line
the state (degree) of congestion; how bad traffic jams are
normalcy; normality; normal
steering; piloting; flying; management; handling; control
incredible; unbelievable; terrific; impressive
naked eye; the physical eye
surely; certainly; without doubt
forward; frontward; ahead; rectangular front
hey there; I say; see here
dangerous; critical; grave; uncertain; unreliable; dodgy
number of digits or characters
minute adjustment; fine tuning
subtle; delicate; difficult; complex; doubtful; questionable
engineer (on a train, ship, aircraft, etc.)
previous generation (e.g. one's parents); family predecessor; predecessor; previous age
indispensable; essential; requisite; required; compulsory; necessary
to be astonished; to be flabbergasted; to be startled; to be amazed