All he needs to do is shell out $30 for paternity testing kit (PTK) at his local drugstore - and another $120 to get the results.

他所要做的就是在住所附近的药店里付30美元买一个父子关系测试包(PTK)，然后另支付 120美元以获得结果。

All he needs to do is shell our $30 for paternity testing kit (PTK) at his local drugstore - and another $120 to get the results.

他所要做的就是在住所附近的药店里付30美元买一个父子关系测试包(PTK)，然后另支付 120美元以获得结果。

All he needs to do is shell out $30 for paternity testing kit (PTK) at his local drugstore — and another $120 to get the results.

2. 他所需要做的就是在当地药店花 30 美元购买亲子鉴定套件 (PTK)，然后再花 120 美元来获得结果。

This is the technique of DNA fingerprinting which is used in forensic science to eliminate the innocent and convict criminals. It is also applied for maternity and paternity testing in humans.

医学诊断。