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9．在中國，科學家則把精力集中在克隆動物以及干細胞上．
In China，scientists havefocused/concentrated their effortson cloning animals，as well as cloned tissues．

分析 在中國，科學家則把精力集中在克隆動物以及干細胞上．

解答 答案：focused/concentrated；on
解析：根據(jù)中文及所給英文題干可知，本題考查focus/concentrate one's effort（s）on doing sth"集中精力做某事"這一固定短語；另外根據(jù)have可知本句為現(xiàn)在完成時．綜上，本題答案為：focused/concentrated；on．

點評 本題考查句子翻譯，做此類題目時一定要根據(jù)中文及英文題干確定需要翻譯的成分，再找出與之對應的英文并考慮各成分是否有形式的改變．

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