surveys and other techniques
调查和其他技术
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Then they combined their findings with earlier surveys, which used other detection techniques, to create a statistical sample of stars and the planets that orbit them, which they say is representative of the galaxy.
WSJ: Galaxy Hosts 100 Billion Planets, in New Estimate
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