拖网渔船已经驶离了泽布吕赫港。The trawler had sailed from the port of Zeebrugge.托网渔船上的船员被聚集到甲板下。The crew of the trawler were gathered below decks.一艘渔船不知从什么地方冒了出来，就在正前方。A fishing boat came out of nowhere, dead ahead....
人体的免疫系统是抵御疾病的主要屏障。The immune system is our main defence against disease.这些人造屏障将会确保提供高度的保护。These man-made barriers will ensure a very high degree of protection.燕山是北京的天然屏障.The Yanshan Hills provide a natural defence for Be...