a bout of depression/flu/sickness etcPERIOD OF TIMEa short period of time during which you suffer from an illness 抑郁/流感/恶心等的发作（时期）a bout of depression/flu/sickness etc• Pablo Fernandez was suddenly stricken by a bout of flu.• Occasionally we all suffer from influenza or a bout of sickness, which naturally results in a drop in weight.
→ a bout of depression/flu/sickness etc at bout(1)