一类是个体创业者和自由职业者，对效率有强烈诉求，核心动机是省时间；一类是有技术认知但不愿亲自动手的职场白领，知道这东西能干什么，只是不想花时间折腾；还有一类是跟风购买的普通消费者，对实际能做什么并没有清晰预期。
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В Москве прошла самая снежная зима14:52
In 1975, Sanger published his own DNA sequencing method alongside laboratory technician Alan Coulson, called the “plus and minus” technique. First, scientists mixed the DNA strand to be sequenced with an enzyme, DNA polymerase, as well as a primer, three normal dNTPs and one radiolabeled dNTP. Radiolabeled nucleotides are incorporated into growing DNA strands just like normal nucleotides, but are tagged with radioactive isotopes, such as phosphorus-32 or sulfur-35, so they can be detected using radiation-measuring equipment.