英和和英

exploratory reconnaissance

a polar expedition

polar expeditions

Was detected

something that is discovered

detect with the senses

a double check

an epoch‐making discovery

the act of surveying land

a hardy explorer

make a discovery

a startling discovery

to make a personal inspection

a landmark discovery

an epoch-making discovery

a polar explorer

Enactment of inspection

a polar expedition

ocular inspection

discover traces of

careful research

to make a person arrest another person

the act of detecting something

to be discovered―be found out

an application for a search

a thing that one is looking for

inspections prior to operation

to find out

come up with

a searching investigation