実じっ験けん段だん階かい

noun, noun which may take the genitive case particle 'no'

experimental stage; experimental phase

Refers to the stage or phase in which something is being tested or trialed, often in scientific, technical, or project contexts.

• その新しん薬やくはまだ実じっ験けん段だん階かいです。

  The new drug is still in the experimental stage.

• 実じっ験けん段だん階かいの技ぎ術じゅつを実じつ用よう化かするには時じ間かんがかかる。

  It takes time to put experimental-stage technology into practical use.