平原: field, plain...
谜: riddle...
一边: one side, either side, on the one hand, on the other hand, doing while...
造价: construction cost...
一向: always (previously), a period of time in the recent past...
滞后: to lag behind...
波浪: wave...
慈善: benevolent, charitable...
酝酿: (of alcohol) to ferment, (of a crisis) to be brewing, to mull over (an issue), to hold exploratory discussions...
时光: time, era, period of time...
