the past; bygone days; one's past (that one would prefer remained secret); past (tense); preterit; previous life
to explain adequately; to be accountable
important position; strategic point; important point; main point; essentials
not just once; more than once; many times; again and again
throughout; over a period of ...; over a span of ...
renovation; overhaul; update; repair; improvement; renewal
to call in; to invite; to bring in
concentration; thickness; density; cardinality
to put together; to gather; to collect; to scrape together
expertise; special knowledge; technical knowledge; expert knowledge
to follow; to come along with one; to accompany
to satisfy the requirements
to be piled up; to lie on top of one another; to come one after another; to happen over and over; to overlap (each other); to occur at the same time
very small amount; insignificant thing; negligible amount
haze (esp. in spring); mist; dimness (of sight)
major war; great war; world war
neighborhood; neighbourhood; street; block; town
probability; likelihood; chances
difference; distinction; discrepancy; mistake; error
to become possible; to become able to (do)
to be mixed; to be blended with; to associate with; to mingle with; to join
to understand; to be convinced; to be satisfied
many; much; plenty; hardly
unsparingly; without listening to the other party; without giving the other party a chance to explain
aspiration; volunteering; desire; application
stronghold; citadel; headquarters
assumption; supposition; hypothesis
to pass; to elapse; to pass through; to go through; to experience; to go through
to drink; to gulp; to smoke (tobacco); to engulf; to overwhelm; to keep down; to suppress
finally; after; following; at the end (of)
the relation of master to servant
which can exist solely due to the presence of; whose existence is determined entirely by; which owes everything to
almost every day; almost daily