He could have died after developing deep vein thrombosis during a flight to Sydney.他在一次飞往悉尼的航行中得了深静脉血栓，险些丧命。The boat can be brought to a stop from full speed ahead within her own length.这艘船可以在一个船身的距离内从全速航行中停下来。A golden rule of sailing is to wear a life jacket.航行中最重要的就是要穿救生衣。