一回事: one thing, the same as...
条款: clause (of contract or law)...
春季: springtime...
观众: spectators, audience, visitors (to an exhibition etc)...
调查: investigation, inquiry, to investigate, to survey, survey, (opinion) poll...
下游: lower reaches (of a river), lower level, lower echelon, downstream...
拨: group, batch...
平日: ordinary day, everyday, ordinarily, usually...
大大: greatly, enormously, (dialect) dad, uncle...
低谷: valley, trough (as opposed to peaks), low point, lowest ebb, nadir of one's fortunes...
