enter since 20 centuries 进入世纪以来
At the beginning of 20 centuries appeared by individual motor drive with gear transmission of the lathe.
20世纪初出现了由单独电机驱动的带有齿轮变速箱的车床。
Maddison's figures show that Asia accounted for more than half of world output for 18 of the last 20 centuries.
麦迪森的数据显示，过去20个世纪中有18个世纪亚洲占全世界产值的一半以上。
Since the 90's of 20 centuries, Some the Neural Network forecast mold were applied in domestic and international atmosphere course.
20世纪90年代以来，国内外在大气学科中开展了很多有关神经网络预报建模和气候分析等应用研究。
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