what proportion; what percentage
underground space; subterranean space; subterranea
layered structure; layered system; stratification; hierarchical structure
to dig up; to dig out; to pick (nose, teeth, etc.); to pry into; to examine closely; to dredge up
to do oneself; to do by oneself; to start work (on); to commence
being used to ...; getting used to ...; being accustomed to; being conditioned to; be familiar with
taking the extenuating circumstances into consideration
during imprisonment; while in jail
broadcasting station; broadcaster
to shine a spotlight on; to highlight; to bring attention to
opening (of a new road, railway, etc.); going into operation (e.g. telephone communication); beginning services; reopening (e.g. of a road to traffic); resumption of services
first departure (of the day); first train; first bus; departing from the starting station (of a bus, train, etc.)
all flights; entire fleet; all mail
operation (of a ship or aircraft route); service; navigation; flight
innovative; liberal; reformist; progressive
promptly; quickly; without delay; before others; first
interview (on television, in a newspaper, etc.)
present post; current office; (an) incumbent
yourself; himself; herself
philanthropic activity; charity work
sale; offering for sale; putting on sale; putting on the market; release (for sale)
appearance (in a film, play, TV show, etc.); performance
home page (of a website or browser); homepage; web page; website
one after another; in rapid succession; without reservation; without hesitation; tramping; stomping
tune (melody, piece of music)
coupling track; B side; B-side
unrequited love; one-sided love
early on; earlier on; from early
outward; superficial; external; apparent
lake; marsh; wetland; inland waters
tail (of an aircraft); empennage; tail assembly