very strong and resilient
非常に強くて耐性がある (hijō ni tsuyokute taisei ga aru)
"She is tough as nails, nothing can break her spirit."
"彼女はtough as nailsで、何も彼女の精神を壊すことはできません。" (Kanojo wa **tough as nails**, nanimo kanojo no seishin o kowasu koto wa dekimasen.)
to discover the main cause of a problem
to memorize something perfectly
a person actively involved in monitoring or controlling an a...
old friends are precious and valuable
to do what one has promised to do
to honor a promise or commitment
