evolutionary theory; theory of evolution
to bear; to stand; to support; to withstand; to be fit for; to be equal to
like; similar to; as with; in the same way
living thing; organism; creature; biology
life; existence; (one's) working life; career; life force; lifeblood
existence; being; survival; to exist; to live; to survive
mostly; nearly; practically; well-nigh; almost invariably; all but
difficult to ...; hard to ...
representative; representation; delegation; switchboard number; main number
conceptual; ideational; notional; theoretical; academic
shall ...; to assume; to suppose
naturally; of course; understandably
to take; to pick up; to pass; to hand; to get; to obtain; to adopt (a method, proposal, etc.)
plan; project; schedule; scheme; program; programme
relation; connection; affinity
thought; report on one's investigation into ...; deceased father
still; yet; more; still more; as ...; like ...
these days; nowadays; now; at present; recently; lately
world history; international history
to win; to gain; to earn; to spread (one's name, etc.)
development; growth; development (of a situation, story, etc.); advancement; playing around; having an active sex life
stage; step; level; rank; order; stairs
order; reservation; order; sequence; order (of magnitude); architectural order
to make a distinction; to differ; to be different