图4显示了选择发射的事件，并采用黄色旗帜图标来指示。
Figure 4 shows the events that are selected to be emitted, indicated by the yellow flag ICONS.
与其发射一架昂贵的大飞船花多年时间航行，他们选择发射上千艘便宜的。
Rather than send one big, expensive spacecraft on a journey of years, send thousands of cheap ones.
适当选择发射周期T和周期数N就可以随意设置梳状滤波器的零传输点，有利于消除某些频率的干扰；
The zero transfer point can be set arbitrarily by appropriately selecting transmitting periodic time T and number N, and it is advantageous to eliminate some interference in some frequency points.
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