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今日题目

Environment problems caused by hard rock mining involve water pollution by metals themselves, chemicals usedin processing, acid drainage, and sediment. Metals and metal-like elements in the ore are toxic and prone-to cause trouble by ending up in nearby streams and water tables as a result of mining operations.

音频讲解

讲解提要

Part 1 满分口语RA示范

Part 2 RA评分细则分析

2.1 发音

Mining ['maɪnɪŋ] 采矿；矿业

Metal [‘metl] 金属（制品）/medal[‘medl] 奖章

Chemical ['kemɪkəl]化学的（adj）；化学制品（n）

Process ['prəʊses] 加工（vt）

Acid ['æsɪd] 酸的；酸性的

Drainage ['dreɪnɪdʒ] 排水（n）：acid drainage 酸性排放

Sediment ['sedɪmənt] 沉积；沉淀（n）

Ore [ɔː] 矿；矿石

Toxic [ˈtɔksik] 有毒的；中毒的

Prone [prəʊn] 有。。。倾向，易于。。的（adj）：- to

Stream[stri:m]（n）小河；流，流出；趋向，趋势/ (v)流出，流

2.2 重音

Environment [ɪn'vaɪrənmənt] 环境；围绕

Involve [ɪn'vɔlv] 使卷入；包含；使专注

Operation [.ɔpə'reɪʃən] 操作，手术，作用（n）

2.3 建议断句方法

//代表长停顿

/ 代表可停可不停（依靠个人气息，可参考音频内详解）

Environment problems caused by hard rock mining involve water pollution by metals themselves, / chemicals used in processing, / aciddrainage, and sediment. // Metals and metal-like elements in the ore are toxic / and prone to cause trouble by ending up in nearby streams / and water tables as a result of mining operations.