一生挚爱标准的英文love of my life。
双语例句
1、兄弟，她是我一生挚爱。
She's the love of my life, bro.
2、一生挚爱（一生只爱一个人）：“她一生中只爱他一个人。”
To be the love of someone's life= to be loved by a person:
"He has always been the love of her life."
3、我心里已把他当作我一生的挚爱。
I'd built him up in my head as being the love of my life.
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