Constructed of white-gray sandstone, the presidential mansion was called the White House as early as1809. 因为全是由白灰色(WTGY)的砂石所建造,早在1809年的时候,总统官邸就已经被称为「白宫」。
After the white-gray sails taut to their spars and ropes. 灰绳拉紧白帆袖桅杆向天愁。
All isolated strains on common nutrient agar presented bacterium colonies with a round shape of neat edge with a central uplift, the surface was smooth and translucent with a white-gray color. 所有分离菌株在普通营养琼脂平板上呈圆形、边缘整齐、中央隆起、表面光滑、灰白色、半透明状的菌落。