// Nothing executes until iteration begins
for a database transaction. How different from "e-cash" is cash itself, when
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3. GrammerlyGrammarly is a real-time grammar checking and spelling tool for online writing. It checks spelling, grammar, and punctuation as you type, and has a dictionary feature that suggests related words. if you use mobile phones for writing than Grammerly also have a mobile keyboard app.，这一点在Line官方版本下载中也有详细论述
candidate[n] = closest colour to goal，更多细节参见Line官方版本下载