基本解释[生物学]块突变区段突变英汉例句双语例句Many such mutations have not yet been identified, and even when a known mutation is found in a tumour, drugs to block its effects may be unavailable.许多类似的变异还没有得到认证。 即便在肿瘤中发现已知的变异，停止变异的药物也是没有。block mutation更多例句专业释义生物学块突变区段突变