cluster sampling丛: crowd together聚: assemble; gather; get togeth ...抽样: sample; sampling; specimen; ...丛聚: clustering丛聚焊: cluster weld下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:丛聚抽样，即可在微信中查询翻译
