to investigate thoroughly; to examine closely; to probe into; to be obsessed with a thought; to brood over; to worry about
usual; normal; everyday; usually; normally; generally
to happen to meet; to come across
(committee) chairman; president
executive secretary; coordinator; organizer; person in charge of making arrangements
very likely; very probable
front and rear; before and after; order; sequence; consequences; context
elementary school; primary school; school for children over eight years old in ancient China; traditional Chinese philology
candidacy; standing as a candidate; bidding (to host an event, e.g. the Olympics)
to be sacked; to be fired; to be dismissed; to be beheaded
sure; certain; reliable; trustworthy; If I'm not mistaken; If I remember correctly
unusual; rare; new; novel; fine (e.g. gift)
intellectual curiosity; out of curiosity; inquisitiveness
aeroplane; airplane; aircraft
hotel charges (for lodging, not meals, etc.)
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
on purpose; deliberately; intentionally
rate; ratio; proportion; percentage
somewhat larger (amount); quite a lot; a little more (than usual); a little extra
to make an appointment; to make a reservation
seat; location (of a gathering, etc.); place; position; post
to be buried; to be covered; to overflow; to be crowded; to be repaid (e.g. debt); to be replenished
empty seat; unoccupied seat; vacancy; vacant post
mostly; ordinarily; probably; most; almost all; ordinary
day; days; sun; sunshine; (the) day; daytime; date
at leisure; in a relaxed manner; in a carefree manner; quietly; peacefully
how many years; how long; what year
compensation payment; reparation