Research is discovering new risk factors of breast cancer such as breast density, age of first pregnancy, and genetic predisposition to breast cancer genes such as BRCA1 and BRCA2.

研究发现乳腺癌的新危险因素，如乳腺密度，首次怀孕年龄，以及乳腺癌基因（如乳腺癌基因一号和乳腺癌基因二号）的遗传易感性。

I'm sure many of you have heard about these cancer genes that can be mutated in families that could put both mother and daughter at risk for breast cancer.

我相信你们中的许多人都听说过这些癌症基因，这些基因可以在家庭中发生突变，从而使母亲和女儿都面临患乳腺癌的风险。

Research is discovering new risk factors of breast cancer such as breast density, age of first pregnancy, and genetic predisposition to breast cancer genes such as BRCA1 and BRCA2. This scientific knowledge can help increase prevention.

研究正在发现乳腺癌的新风险因素， 如乳腺密度、首次怀孕年龄以及乳腺癌基因（ 如BRCA1和BRCA2） 的遗传易感性。 这种科学知识可以帮助加强预防。