chromosomal abnormality的用法和樣例：
例句
- Chromosome abnormality is an important factor involved in male infertility and gonadal hypoplasis.
染色體異常是影響男性不育和性腺發(fā)育不全的重要因素。 - The majority of aberrations are sporadic although on rare occasions a chromosomal disorder is directly inherited.
盡管偶爾可見(jiàn)一種染色體疾病是直接遺傳的，但是大量的染色體異常是散發(fā)的。
