In science, unlike math, we can't have absolute certainty, but in the scheme of things, this is not a health risk I would be concerned about at all.

不像数学，在科学里我们不能有绝对的肯定。但是在日常生活中，我肯定不会担心手机会给我的健康带来什么威胁。

youdao

Hence, in many situations "safety" can not be absolute but must entail an "acceptable" level of risk, however and by whom that level may be defined.

因此，在许多环境中，“安全”并非绝对的，但是也必然带来“可接受”层次上的风险。究竟该怎样又由谁来界定这个层次？

youdao

Results show that in two situation both absolute and standard difference, fund size, risk tolerance of investors can not fully explain the movement of the stock market;

结果表明，在绝对差别与标准差别两种情况下，基金规模、投资者的风险容忍度不能充分解释股票市场的流动性，与股票市场波动性的关系不显著；

youdao

For some reason, most investors know not to take analyst equity ratings as absolute guarantees of future risk.

FORBES: At Odds Over S&P