sentence1: This is one reason why London has experienced the other, darker side of the multicultural society: the veneer of multiculturalism is thin. It does not take much to turn people of one group against those of others with whom they had apparently lived in peace.
sentence2: これは、ロンドンが、多文化社会の暗い方の側面を目の当たりにすることになった理由でもある｡多文化主義の表面はうすっぺらで、それまで平和に共存してきた民族グループ同士のぶつかり合いはいつでも起こり得る事なのだ｡