镜像

jìng xiàng mirror image

技术

jì shù technology; technique; skill; CL:門|门[men2],種|种[zhong3],項|项[xiang4]

采集

cǎi jí to gather; to collect; to harvest

方法

fāng fǎ method; way; means; CL:個|个[ge4]

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