So much is still unknown that most experts don't advise consumers to use genetic-testing services to try to understand their risk for complex conditions like alcohol ism.

由于许多情况仍不清楚，多数专家并不建议消费者利用基因测试了解他们染上酗酒等复杂病症的可能性。

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Recent advances within molecular genetics to identify the genes for deafness mean that it is now possible for genetic counseling services to offer genetic testing for deafness to certain families.

随着分子遗传学技术在致聋基因的克隆、鉴定等方面应用的进展，使得为某些家庭进行遗传咨询成为可能。

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