I've heard that ...; rumour has it that ...; it appears as if ...
human being; human; person; character (of a person)
immune strength; immunity
to raise; to lift; to boost; to enhance
communicable disease control (e.g. by quarantine, disinfection, etc.); prevention of epidemics
order; system; structure; set-up; organization; organisation
strengthening; intensifying; reinforcement; enhancement; solidification
that; it; then; that point (in time); (arch.) there; (arch.) you
to learn; to acquire knowledge; to carry; to wear (clothes, etc.); to put on
in succession; one by one
to hit; to strike; to strike (noon, etc.); to sound (cymbals, etc.); to beat (rhythmically, e.g. pulse, waves, etc.); to move; to impress
hand; arm; forepaw; foreleg; handle; hand; worker
to see; to look; to examine; to look over; to look after; to attend to; to experience
existence; being; survival; to exist; to live; to survive
to intimidate; to frighten; to scare; to threaten (e.g. peace); to jeopardize; to endanger
serious; important; significant; grave; weighty
crisis; critical situation; emergency; pinch
frantic; frenetic; inevitable death; brinkmate (inevitable checkmate)
regarding; in; to; towards; with regards to
resistance (e.g. to antibiotics); tolerance (e.g. drug tolerance)
strong; potent; strong; brawny; good (at); skilled; being able to handle
toxicity; virulence; toxic; virulent; poisonous
to hold (in one's hand); to take; to possess; to have; to maintain; to keep; to last
system; lineage; ancestry; group (e.g. of colors) (colours); family (e.g. of languages); close (evolutionary) relationship
be; is; did; (have) done; please; do
exactly; surely; right then; just then; just (about to); on the verge (of doing or happening)
arms race; armaments race
living thing; organism; creature; biology
breeding; multiplication; increase; propagation; reproduction
rate; ratio; proportion; percentage
in comparison to; rather than
good; advantage; sake; purpose; consequence; result
selfish; egoistic; self-serving; self-interested
to behave; to conduct oneself; to entertain; to treat someone (to a drink); to make tea for someone (tea ceremony)
person; -er; (arch.) expert; (arch.) geisha; (arch.) prostitute
theory; doctrine; opinion; view; rumour; rumor
oneself; oneself; for oneself; personally
to leave (behind); to leave (undone); to not finish; to save; to set aside; to leave (to someone, esp. after one's death)
for; for the sake of; to one's advantage; because of; as a result of