messages.content: 请把下面的中文句子翻译成英文
messages.role: system
messages.content: 雌酮（E1）是绝经前乳腺脂肪组织中主要的雌激素, 脂肪组织中E1和CYP19A1的mRNA表达与BMI呈正相关。
messages.role: user
messages.content: Estrone (E1) was the predominant estrogen in premenopausal breast adipose tissue, and E1 and mRNA expression of CYP19A1 in adipose tissue correlated positively with BMI.
messages.role: assistant