英和和英

an exploratory operation

exploratory reconnaissance

thoroughgoing research

painstaking research

empirical research

meticulous research

consumer research

entomological research

assiduous research

research-intensive

development study

zoological research

scientific inquiry

facilities for study

a thorough study

an exhaustive study

study of the earth's surface

Flow of research

do research

virological research

an exhaustive study

thorough research

the study of agriculture

ecological research

collaborative research

AIDS research

patient research

well-funded research

to go through a long course of study―make a long study of a subject

to go through a long course of study