高浓度中，它可导致显著的急性肺水肿，相反慢性暴露在低浓度中可以导致显著的肺纤维化。
At high concentrations, it can cause significant acute disease with pulmonary edema, whereas chronic exposures at lower concentrations can lead to significant pulmonary fibrosis.
麦基博士提醒说，此实验是在一个十分受控的实验环境下做的，它尚不能分辨出慢性疼痛和急性疼痛。
Mackey cautioned that the study was done in a very controlled lab environment, and it did not look at the differences between chronic and acute pain.
在某些情况下，在慢性接触的儿童中仍可见到急性中毒病例，其血液中含铅量达到可干扰其正常功能的程度。
In certain instances, cases of acute poisoning may still be seen in children who are chronically exposed and whose blood lead levels reach levels that interfere with normal functions.
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