1. Heredity is not a factor in causing the cancer. 遗传并非导致这种癌症的一个因素。
2. The moral characters of men are formed not by heredity but by environment. 人的品德不是由遗传而是由环境形成的。
3. If identical twins are more similar to each other with respect to an ailment than fraternal twins are, then vulnerability to the disease must be rooted at least in part in heredity. 如果同卵双胞胎彼此在疾病方面比异卵双胞胎更相似,那么这种疾病的易感性至少在一定程度上是由遗传造成的。
4. Some diseases are present by heredity. 有些病是遗传的结果。