通州
Tongzhou district east of Beijing, formerly Tong county; Tongzhou county level city in Nantong 南通[Nan2 tong1], Jiangsu
同舟共济
cross a river in the same boat (idiom); fig. having common interests; obliged to collaborate towards common goals
同轴圆弧
coaxial circular arc; concentric arc (in spherical geometry)
通州区
Tongzhou district east of Beijing, formerly Tong county; Tongzhou county level city in Nantong 南通[Nan2 tong1], Jiangsu