Long long ago, we knew the periodic motion of a planet.很久以前, 我们就知道行星的周期运动.Periodic checks are taken to ensure that high standards are maintained.定期检查以确保维持高水准。Some commercial laboratories use periodic nitrate tests as gui...
The microstrip log periodic antenna was discussed and analyzed.讨论和分析微带对数周期天线.Two periodic jackknife, be helpful for national economy growing quickly continuously.两个周期的重叠, 有利于国民经济持续快速增长.The motion is periodic, which means...