chromosome abnormalities 基本例句 染色体异常 Miscarriages are usually caused by abnormal chromosome patterns in the fetus.流产通常是因为胎儿的染色体异常造成的。 Chromosome abnormality is an important factor involved in male infertility and gonadal hypoplasis.染色体异常是影响男性不育和性腺发育不全的重要因素。