Vocabulary

(at) one's own expense

self-justification; excuse

self-centeredness; self-centredness; selfishness; egotism; egoism

self-satisfaction; (self-)complacency; smugness

self-contradiction; paradox; antinomy

(private) study room

person who has great confidence (faith) in himself

self-healing; spontaneous recovery

natural philosophy

destruction of nature

bicycle trip; cycling tour

rotation period

automatic turnstile (ticket gate)

driving school

car accident; automobile accident

automaton; automata

automatic translation machine

discretionary power

free market

free time; time at leisure

free economy

ability to discriminate or discern; (powers of) discrimination or discernment

attachment (to); tenacity of purpose

office (e.g. the Oval Office)

chamber orchestra

mass number

business world; business circles

material for experiments; experimental material

proving ground; test site

experimental psychology

experimental device; experimental equipment

experimental stage; experimental phase

laboratory animal; experimental animal

executive committee

practicality

practical question; practical problem; practical matter

real-time operation

market price

stereoscope

full-size model; mock-up