Error is often the precursor of what is correct.错误常常是正确的先导.Real tennis, an ancient precursor of the modern game, originated in the eleventh century.室内网球，现代网球运动的古老前身，起源于11世纪。Error is often the precursor of what is correct...
The pinch valve vault and control structures could be built around the existing live interceptor.夹管阀的拱顶和控制结构可以配置在现有的洪水拦截系统周围....the vault of a great cathedral.一座大教堂的拱顶He could easily vault the wall...他可以轻松地翻过墙去。He ordere...
During fever a large quantity of fluid is lost in perspiration.发烧时，大量水分会通过排汗而丧失。Evans had rheumatic fever, missed school and fell behind.伊万斯得了风湿热，没去上课，功课也落下了。Symptoms are a slight fever, headache and loss of appetite.症状包...