First of all, I will ask another crew member to check the smoke source. At the same time, we will wear the oxygen mask and smoke goggles in case the smoke is toxic. We will follow the SOP and perform the checklist to try to solve the problem. Then we will advise the controller of our situation and request to descend to ventilate the aircraft due to smoke on board. Finally, we will request to land as soon as possible and request fire services and medical assistance upon arrival.首先，我会让另一名机组成员检查烟雾来源。同时，我们会戴上氧气面罩和防烟护目镜，以防烟雾有毒。我们会遵循标准操作程序（SOP），执行检查单尝试解决问题。随后，会将情况告知管制员，请求下降以给因机上烟雾而通风换气。最后，会请求尽快着陆，并在抵达时要求消防和医疗援助 。

First of all, I will ask the cabin crew to check the smoke source. At the same time, we will advise the controller of our situation and request to descend to ventilate the aircraft due to smoke on board. Finally, we will request to land as soon as possible and request fire services and medical assistance upon arrival.首先，我会让客舱乘务员检查烟雾来源。同时，我们会将情况告知管制员，请求下降以给因机上烟雾而通风换气。最后，会请求尽快着陆，并在抵达时要求消防和医疗援助 。

There are some reasons for smoke in the cockpit. For example, electrical system problems, wire wear - out, dangerous goods leakage, and so on.驾驶舱出现烟雾有多种原因，比如电气系统故障、导线磨损、危险物品泄漏等等 。

I have not heard of any. I think smoke or fire is very dangerous for flight safety. Because they may develop very fast, and it will have serious consequences; the aircraft may be out of control.我没听说过这类事故。我认为烟雾或火灾对飞行安全极为危险，因为它们可能蔓延发展得很快，会产生严重后果，飞机可能会失控 。