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microdot造句
1. The recipient would read the microdot with a special viewer. 2. Each microdot is the size of a grain of sand and contains an identifier. 3. You want to leave the smallest imprint possible: a microdot. 4. Transferring secret documents during the Cold War was aided by this microdot camera that could photograph and reduce whole pages of information onto a tiny piece of film the size of a sentence period. 5. There exists an extended set of early Triassic intermediate-acid volcanics closely related to microdot gold ore in Southwestern Guangxi.