low-altitude flying; having consistently poor results (grades, sales, etc.); barely scraping by; being on the verge of failing
child of mixed parentage; mixed-race child
via; through; by doing; by means of; using
cushion; cushion (to soften the blow); mitigation
far away; far off; far; long ago; long before
to endure; to keep out (e.g. rain); to pull through; to get over; to surpass; to outdo
incomparable; cannot compare (with); beyond comparison; in another league
load capacity; loading capacity; carrying capacity
hovercraft; air-cushion vehicle; ground-effect machine
motility; mobility; maneuverability
to advance; to move forward; to carry forward (plans, work, etc.); to proceed with; to raise; to elevate
experimental stage; experimental phase
underwater navigation; going underground; going into hiding; travelling incognito
to regain one's footing; to get back on one's feet; to recover; (of the market) to improve
suddenly; at once; considerably; very much; firmly; with an effort
lower region; lower part; region below
baron; Irish cobbler (variety of potato)
to cut into (a line, conversation, etc.); to force oneself into (e.g. a crowd); to fall below (of stock prices, sales, etc.); to drop below; to wedge; to play a wedge
inquiry into; enquiry into; prying (into); investigation; search; exploration
venomous snake; poisonous snake
sickle-shaped neck (e.g. snake, praying mantis); crooked neck; gooseneck
thrust; driving force; propulsion
jet aeroplane; jet airplane
performance; trick; feat; extraordinary deed; daring act; bold move
principle; theory; fundamental truth
shooting down (an aircraft)
suddenly; in a flash; quickly; conspicuously; prominently; showily
to lean against; to set against
work clothes; workwear; boilersuit; overalls
to stop (in one's tracks); to come to a stop; to halt; to pause; to stand still
drawing; diagram; plans; blueprint
second; number two; runner-up
(electric) circuit; (racing) circuit; race track; circuit (of events or venues)