if at first you don't succeed
Persistence is important in the pursuit of success.
The ability to undergo transfection
simple past tense and past participle of validify
A light bulb whose metallic filament is heated by an electric current.
コーチはいつも、最初にうまくいかなくても諦めずに上達するまで練習を続けるよう私たちに言っていました。
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