参考译文：大卫。格兰多指出的这些变化给英国的英语教学工作者提出了明确的和巨大的挑战，这些英语教学工作是面向其他国家的人和更为广泛的商业教育机构的。
Thee changes identified by David Graddol all present clear and major challenges to UK's providers of English language teaching to people of other countries and to broader education business sectors.
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