大使: ambassador, envoy...
底层: ground or first floor, bottom (of a pile), lowest rung (of society)...
检查: inspection, to examine, to inspect...
工程: engineering, an engineering project, project, undertaking...
干戈: weapons of war, arms...
嫩: delicate; tender...
好好: well, carefully, nicely, properly...
观摩: to observe and emulate, to study (esp. following sb's example)...
喇叭: horn (automobile etc), loudspeaker, brass wind instrument, trumpet, suona...
自己: oneself, one's own...
