mitral valve; bicuspid valve
counter-current; adverse tide; regurgitation (of blood)
artificial valve; artificial heart valve
had better ...; had better not ...
dear (old); fondly-remembered; beloved; missed; nostalgic
argument; discussion; dispute; controversy
to make war (on); to wage war (against); to compete (against); to struggle (against adversities, etc.); to fight
preservation; retainment; keeping
important; serious; valuable; precious; serious matter; major incident
to put; to place; to leave (behind); to establish (an organization, a facility, a position, etc.); to set up; to appoint (someone to a certain position); to hire
no matter what it takes; by any means necessary; at all costs; by hook or by crook
to sleep; to die; to rest (in peace); to lie idle (e.g. of resources); to lie unused; (arch.) to close one's eyes
don't worry; there's no need to worry
skillful; skilled; proficient; flattery
primary school; elementary school; grade school
surely; undoubtedly; sternly; severely; having no slack; rigid
to be absent; to take a day off; to rest; to have a break; to go to bed; to (lie down to) sleep
holiday; day off; sleep; rest; Good night
to set foot into; to enter; to step inside; to cross the threshold
belief; faith; conviction
hello (e.g. on phone); excuse me! (when calling out to someone)
there's no (other) way; cannot be helped; unavoidable; it's no use (doing); pointless; hopeless (person)
indeed; really; absolutely; truly; actually; very
I'm off; see you later; to go (and then come back)
thorough checkup; complete examination; complete physical; detailed testing
suspension; stoppage; discontinuance; interruption
somehow; how; in what way; why; what kind of
information technology; IT
detection (of a plot, fraud, etc.); discovery; coming to light; being uncovered
metabolism; renewal; regeneration; replacing the old with the new
administration (of medicine)