Objective To construct a new retroviral vector with double-suicide genes and knockout-inducible SV40T gene, with the aim of optimizing immortalization of hepatocytes.

目的构建携带双自杀基因且可诱导敲除SV40T的逆转录病毒载体，优化目前的肝细胞永生化。

youdao

Investigators believe the deaths came from either a "murder-suicide" or a "double suicide, " he said.

CNN: NH police chief killed days before retirement

And there is always the risk of a double love-suicide.

ECONOMIST: Be cruel to be kind: penalise, nationalise, recapitalise

They found that children raised by one parent had more than double the risk of suicide attempt and alcohol-related disease.

BBC: 'Suicide risk' for lone parent kids