China was the first country in the world to synthesize crystalline insulin, a bioactive protein.中国在世界上最早用人工方法合成一种有生物活力的蛋白质--结晶胰岛素.There are many amino acids that the body cannot synthesize itself.有许多种氨基酸人体自身不能合成。Etioplas...
长达25英里的交通拥堵阻塞了M6号高速公路的北行车道。A 25 mile traffic jam clogged the northbound carriageway of the M6.唯一的问题就是大量水草阻塞了水道。Large, clogging banks of weed are the only problem.在威尔士的中部地区，6英寸厚的大雪阻塞了道路。In Mid-Wales six inches of snow blo...
他已经张贴了一张“禁止钓鱼”的告示牌。He has posted a sign up that says "No Fishing"她那钓鱼的故事令我心烦意乱.She got on my nerves with her fishing stories.钓鱼的关键就是要有耐心.In fishing , patience is the name of the game....
Many children are now born into or raised in one-parent families.现在很多孩子在单亲家庭中出生或成长。Parent birds began to hunt for food for their young.亲鸟开始为幼鸟寻找食物。Ninety per cent of lone parent families are headed by mothers.90%的单亲家庭由母亲...