Definition
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一生
isshō
人の生きている期間。
The period during which a person lives.
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彼は一生を通じて多くの本を読んだ。
Kare wa isshō o tsūjite Ōku no hon o yonda.
He read many books throughout his lifetime.
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一生の間にたくさんの経験を積むことが大切だ。
Isshō no aida ni takusan no keiken o tsumu koto ga taisetsu da.
It is important to gain many experiences in a lifetime.
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一生で一度も海外旅行に行ったことがない。
Isshō de ichido mo kaigai ryokō ni itta koto ga nai.
I have never traveled abroad in my lifetime.