have achieved considerable progress
have achieved considerable progress
取得了相当大的进展
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Western Europe and Japan set about their research and investigation in the second half of the 1980s, and have achieved considerable progress.
西欧和日本自80年代后半期开始开展返回式卫星的研制，近些年来，获得了一些进展。
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