observation
オブザベーション、監視、観察
Deixis
Introspection
metaphysics of presence
Naturalistic observation
Observation unit
Observational astronomy
Observational error
Observational learning
Observational study
Observable quantity
Observations and Measurements
Observatory
Observer effect
Present
Self
Theory ladenness
Uncertainty principle
unobservable
https://source.unsplash.com/featured/?observation#.png
/suto3/google.iconobservation
image observation
define observation
wikipedia observation
weblio observation
kotobank observation
jisho observation