H spent three hours learning Lincoln's Address at Gettysburg by heart.他花了三小时把林肯的《葛底斯堡讲话》背了下来。He lives about 60 miles upstream from Oahe, near Gettysburg, South Dakota.他住在奥阿希湖上游约60英里处，靠近南达科他州的葛底斯堡。Your friend already...
这个区域叫做盲点.The region is called the blind spot.你觉的他们会在那个盲点上分侦查兵 吗 ?You think they'll be covering that blind spot with recon patrols?比如视觉盲点, 飞行幻觉等等.The as why blind spot, visual illusions and so on....