英和和英

Without detection

No detection

not discovered

not able to be found

not watched

Can't find it

Can't find it

Couldn't find it

not observed

an unidentified species

I haven't checked if the payment has been made.

not capable of being collected

not chartered

haven't/hasn't received …

not recorded

not registered

not solved

I can not comprehend―I am at a loss to comprehend―It is incomprehensible―unaccountable―mysterious―strange.

not enforced

not observed

not yet discovered

not having come in contact

not recognized

It hasn't been enforced.

not yet identified

no suspect has been found to date

I see no good in him

I see nothing in him.

not brought under control

have not been set；has not been set