The result showed chromosome abnormal is a basis reasons of Down syndrome, It has occasional and inducing factor such as years of morn, environment and so on have an important effect to it.是什么意思_The result showed chromosome abnormal is a basis reasons of Down syndrome, It has occasional and inducing factor such as years of morn, environment and so on have an important effect to it.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句