As for harm, brain and nerve damage from silver exposure is rare, but colloidal silver can cause kidney damage, stomach distress, and headaches.
至于害处，虽然银暴露对脑和神经的损伤比较罕见，但胶银能导致肾损伤、腹痛及头痛。
What traffic teaches us is that reckless and uncontrolled change is as likely to harm us as it is to benefit us, and that thoughtful regulation is necessary for a better future.
交通教会我们的是，不计后果、不受控制的变化既可能造福我们，也可能伤害我们，而考虑周到的监管对更美好的未来而言非常必要。
For now, though, there is more concern than harm as the overall impact of the oil leak remains unclear and cleanup efforts provide a lift for some.
不过，由于漏油事故的总体影响还不明了，清理工作提振了一些公司的业务，目前来说，担忧多于实际的伤害。
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