187. The report cites two main causes: increasing physical isolation—brought on by high divorce rates and less involvement in community, among other things—and a growing perception that the world is a more dangerous place.
譯文
該報(bào)道引用了兩個(gè)主要原因：由高離婚率和對(duì)社區(qū)活動(dòng)參與的減少造成的孤獨(dú)感，以及越來(lái)越多的（孩子們）認(rèn)為這個(gè)世界更加危險(xiǎn)。
點(diǎn)睛
本句的主干是the report cites two main causes: increasing physical isolation and a growing perception。兩個(gè)破折號(hào)之間的部分修飾isolation; that引導(dǎo)定語(yǔ)從句，修飾perception。
本句中應(yīng)當(dāng)注意：cites一詞為cite的第三人稱單數(shù)形式，意為“引用”；考生需注意與cities（城市）區(qū)分。isolation意為“隔離；孤立”。如：
His isolation has made him blunt about the feelings of others. 他的孤立使他對(duì)別人的感情木然無(wú)知。
perception意為“感覺(jué)；洞察力”。如：
His analysis of the problem showed great perception. 他對(duì)該問(wèn)題的分析顯示出其敏銳的洞察力。
考點(diǎn)歸納
cause與reason都可以表示原因，二者的區(qū)別在于：
cause是必然導(dǎo)致某結(jié)果發(fā)生的原因或者條件。如：
Don't complain without good cause. 沒(méi)有充分的理由就不要抱怨。
reason指解釋某種結(jié)果的發(fā)生或性質(zhì)。如：
We have reason to believe that he was murdered. 我們有理由相信他是被謀殺的。
