1.approval 批准
The chairman has also given his approval for an investigation into the case
主席也已同意对此案进行调查。
2.bureaucratic 官僚的
The report revealed a great deal of bureaucratic inefficiency.
报道大量揭示了官僚体制的无能。
3.lag 延迟
There's a time lag between infection with HIV and developing AIDS...
从感染艾滋病病毒到病发有一段滞后期。
4.airborne 空气传播的
Many people are allergic to airborne pollutants such as pollen.
许多人对空气传播的污染物过敏，比如花粉。

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