dig up 挖出;掘起;开垦;发现
Palace mural 宫廷壁画
heroic statue 英雄雕像
in for a treat 会喜欢的
spoor n. 足迹;痕迹
turn up 出现;发生
by definition 按照定义;显然地;当然地
make sense of 了解……的意义;理解;懂得
unprecedented adj. 空前的;无前例的
readiness n. 敏捷;准备
putrid adj. 腐败的;腐烂的;令人厌恶的
strata n. 层;阶层
noxious adj. 有害的;有毒的
leach v. 渗入;渗透
methane n. 甲烷
penetrate v. 渗透;穿透
heyday n. 全盛时期
chronicle v. 记录;把…载入编年史 n. 编年史，年代记;记录
gist n. 主旨;要点
Question time:
1. What's the difference between Palace murals, heroic statues and rubbish with regard to history?
2. Can you list the ways that we deal with rubbish according to the passage?