The keystone of this dissertation is the conformation of the trading model, including the buyingsignal model, and the selling signal model.
论文的重点在于交易模型的构造，包括上证指数买入信号模型、卖出信号模型的构造。
2
Think about buying an aerial with a built-in signal amplifier, especially if the television set is more than 20 feet (six metres) away.
特别是如果电视机与天线距离超过超过20英寸(6米)，就得考虑买一个内置信号放大器的天线。
3
The deal may signal the start of a smart-grid buying spree for cash-equipped conglomerates like Toshiba eager to tap the vast capital outlays expected from electric utilities over the next decade.