This kind of very invasive weed is almost unkillable using off-the-shelf weedkillers. 使用现成的除草剂几乎无法杀死这种侵入性很强的杂草。
She got a reputation as being an unkillable secret agent, having escaped from many seemingly impossible situations. 她以打不死的秘密特工而闻名，因为她从许多看似绝境的情况下逃脱。