可在其上按一定模式穿孔的一种纸带.A tape in which hole patterns can be punched.在穿孔的连续格式纸上, 割线之间的间距.In perforated continuous forms paper, the interval between cuts.自动地将编码电信号变换为纸带上的穿孔的任何纸带穿孔机.Any tape punch that automatically converts code...
One laboratory stock of Drosophila melanogaster has very reduced or vestigial wings.果蝇的一种实验品系,翅膀缩小,称为残翅.Vestigial remains of these plays are now seen in the Christmas pantomime.在圣诞节演出的哑剧中还能看到这些戏剧残留下来的痕迹。The wings of the ...
在森林中, 潮湿的树木与针叶会使讯号变弱.In a forest, wet wood and needles attenuate the signals.收音机里嘟嘟地发出五点钟报时讯号.The radio squeaked five.其他的比例反馈讯号是由速率陀螺产生的.Other proportional feedback signals are generated from rate gyros....