经纬: warp and woof, longitude and latitude, main points...
带头人: leader...
政治: politics, political...
区: area, region, district, small, distinguish...
课堂: classroom...
得力: able, capable, competent, efficient...
上司: boss, superior...
牛: ox, cow, bull...
共性: overall character...
不仅: not only (this one), not just (...) but also...