難句突破：

(1)   This is good news for the mine's 1,000 or so employees and for the town, which has depended on the diamond business since Sir Thomas Cullinan discovered a prospect there in 1898 that contained kimberlite, a rock that can be rich in diamonds.

[主體句式] This is good news for ...

[結(jié)構(gòu)分析] 這是一個(gè)簡(jiǎn)單句，for后面的賓語(yǔ)比較復(fù)雜，which 引導(dǎo)的非限定性定語(yǔ)從句修飾the town，在該從句中有一個(gè)since引導(dǎo)的狀語(yǔ)從句；在該狀語(yǔ)從句中，that 引導(dǎo)的定語(yǔ)從句修飾prospect, a rock...是kimberlite的同位語(yǔ)。

[句子譯文] 這對(duì)于這個(gè)礦的1000名左右的雇工以及這個(gè)小鎮(zhèn)來(lái)說(shuō)是個(gè)好消息，這個(gè)小鎮(zhèn)從1898年Thomas Cullinan爵士發(fā)現(xiàn)該礦含有金伯利巖（可能富含鉆石的一種巖石）后，就一直依賴(lài)鉆石生意存活。

(2) It started focusing on higher returns rather than market share, and has been revamping its mine portfolio, selling off mines that are no longer profitable and investing in more enticing operations, such as its mine off the west coast of South Africa, its Voorspoed operation in the Free State province, and two new mines in Canada.

[主體句式]It started focusing on..., and has been...

[結(jié)構(gòu)分析] 這是一個(gè)并列句，由連詞and 連接，后半分句結(jié)構(gòu)比較復(fù)雜；has been 后面帶有三個(gè)并列的成分，第二個(gè)成分selling off mines后面有that 引導(dǎo)的定語(yǔ)從句，第三個(gè)成分中such as 后面都是用來(lái)修飾operations的。

[句子譯文] 它開(kāi)始修關(guān)心更高的回報(bào)率而不是市場(chǎng)份額了，也一直在修改它的礦產(chǎn)組合，賣(mài)掉不再盈利的礦產(chǎn)，投資更讓人動(dòng)心的項(xiàng)目，如南非西海岸的礦產(chǎn)、自由州省的Voorspoed項(xiàng)目、加拿大的兩處新礦。