将“precursor"翻译成中文

And we see displacement, which is so often the precursor to lasting dependency, destitution and lost opportunities.

我们看到流离失所现象,而这种现象往往是持久依赖外援、一贫如洗和丧失机会的前兆。

These occur after a minimum exposure of approximately five years and may be a precursor to skin cancer.

这些是最低限度大约五年砷接触后发生的,可能是皮肤癌的先兆。

Of that Sri Lanka has no doubt, having contributed to its precursor.

对此,斯里兰卡是毫不怀疑的,因为斯里兰卡对该文件的前身也作出过贡献。