on one's Jack Jones
By way of preparation.
(biochemistry) A molecule involved in the metabolism of porphyrin. It is generated by the enzyme porphobilinogen deaminase and then converted into uroporphyrinogen III.
(Cockney rhyming slang) On one's own; alone.
The act of assuring; a declaration tending to inspire full confidence; something designed to give confidence. / The state of being assured; total confidence or trust; a lack of doubt; certainty.
都会に引っ越すと、友達を作るのに苦労して、あっという間に一人で過ごすことになることがある。
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