Heredity is not a factor in causing the cancer.
遗传并非导致这种癌症的一个因素。
Heredity is a predisposing factor, but the exact mechanism is unclear.
遗传是患病因素之一，但确切的机制并不清楚。
Diet and exercise can influence a person's weight, but heredity is also a factor.
节食和运动能影响人的体重，而遗传也是一个因素。
Diet and exercise can influence a person's weight, but heredity is also a factor.
节食和运动能影响人的体重，而遗传也是一个因素。
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