The present paper gives the key to the third stage larvae of the most common necrophagous flies, including 11 species, belonging to 4 families.

本文提供上海地区最常见嗜尸性蝇类三龄幼虫图解检索表，共4科11种。

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The QCA put PSHE into 4 key stages, 5-7 is the first stage, 7-11 is the second stage, 11-14 is the third stage, 14-16 is the fourth stage.

英国的课程质量委员会把PSHE分为四个关键期：5—7岁是第一个关键期，7—11岁是第二个关键期，11—14是第三个关键期，14—16是第四个关键期。

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It found its two strengths were rising standards in Key Stage 3 and in Key Stage 4 mathematics, and effective management of the construction work.

BBC: Thetford Academy put in special measures

Another is to continue funding only Key Stage 4 pupils until the end of Year 11 to phase out the free transport over two years.

BBC: Parents protest over Luton council's faith school bus cuts

Head teacher Dr Peter Kent said much of the school's success was down to Key Stage 4 being spread over three years rather than the traditional two.

BBC: Struggling pupils don't catch up, data shows