1. "The Daphnia system is an exquisite aquatic sensor, a potential high-tech and modern version of the mineshaft canary," he said.
“水蚤系统是一种敏锐的水中传感器、一种潜在的高科技、一种现代版的矿区金丝雀，”他说。
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2. In 1955, Marty McFly and Doc Brown use the information in Doc's 1885 letter to retrieve and repair the damaged DeLorean (which has been waiting for him in a mineshaft for 70 years).
3. In 1955, Marty McFly and Doc Brown use the information in Doc's 1885 letter to retrieve and repair the damaged DeLorean (which has been waiting for him in a mineshaft for 70 years).
