New medicines are registered and enter the market with limited safety evaluation during clinical trials; rare unexpected side effects can only be detected during large-scale use.
新药物在临床试验期间接受有限的安全性评估后，即正式注册并投放市场；在大规模普遍使用过程中，只能出现极为罕见的意外的副作用个案。
A more subtle cause of side effects is the evaluation of properties and other implicit function calls in managed code.
产生副作用的一个更难以捉摸的原因，是在托管代码中计算属性和其他隐式函数调用。
However, upgraded competition among media operators, noisy communication environment, increased difficulties of effect evaluation and so on as side effects are coming with the flourish.
然而与之相伴的是媒介经营者的竞争升级，广告传播环境的嘈杂，广告效果评估的难度日增。
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