maintenance; servicing; putting in place; development; improvement
crash; smash; bang; sound of a large, heavy object falling
bulletin board; display board; notice board; electronic bulletin board; BBS
may; might; perhaps; may be; possibly
when it comes to ...; where ... is concerned; if it's the case that ...; if it turns out that ...; if it's true that ...
I see; that's right; indeed
blind spot (on the retina); blind spot; weak point; loophole
deep (hole, forest, snow, etc.); dense (e.g. fog); thick (e.g. weeds, woods); close (e.g. relationship); deep (involvement); intense (e.g. longing, flavor); severe
dark; gloomy; depressed; dispirited; dark (in colour); dull; ill-boding
(not) anything; (nothing) at all; and everything else; and all; (not) at all; (not) in the least
below; down; bottom; beneath; underneath; just after; right after
to descend (e.g. a mountain); to go down; to alight (e.g. from bus); to get off; to step down; to retire; to be granted
to pick up; to pick out (e.g. key points in an article); to single out; to point out
concentration; density; cardinality
abnormal; unusual; extraordinary; remarkable; uncommon
unprepared; careless; imprudent; indiscreet
to enter; to come in; to join (a club, company, etc.); to enter (a university, the army, etc.); to be contained (in); to be included (in); to (be able to) fit (in a container, building, etc.)
danger; peril; hazard; risk
gas (as a fuel); gas (state of matter); poison gas; dense fog; thick fog; gas stove; gas cooker
to collect; to gather; to save; to accumulate; to pile up
hah (derisively); pooh; pfft (of something disappearing); poof; huff; puff
target; object (of worship, study, etc.); subject (of taxation, etc.); coverage
discovery; detection; finding
a-ha-ha (laughing loudly)
landing (on the ground); landing place; terminal; (shipping) destination; outcome; final result
impact; shock; impulse; (psychological) shock
to be separated; to be apart; to leave; to go away; to leave (a job, etc.); to quit
to collapse; to crumble; to get out of shape; to lose one's shape; to break down; to be thrown into disarray; to crash (stock market)
may; might; perhaps; may be; possibly
fast; quick; early; soon; premature; too soon
light; illumination; ray; happiness; hope; influence; power
to insert; to put in; to come in (of light); to shine in; to have a griping pain (in the stomach, chest, etc.)
early days; early years; early stages; initial stages; beginning
correspondence; communication; transmission; news; signal; telecommunications
receiving (a message, letter, email, etc.); reception (radio, TV, etc.)
to (finally) arrive at; to reach (at last); to (manage to) get to; to find one's way to
hey!; say!; I say!; I; me
draw (in competition); tie game
something like ...; things like ...; someone like ...; the likes of ...
diligently; seriously; perfectly; properly; sufficiently; satisfactorily
to be troubled; to have difficulty; to be bothered; to be inconvenienced; to be badly off; to be hard up
consultation; discussion; discussing; asking (someone) for advice
approximately; about; to (about) the extent that; (almost) enough that; as ... as ...; like