“间歇地”用英语怎么说

还设计了另一种系统,它能够间歇地发送瞬间脉冲.Still another system is designed to send out transient pulses intermittently.狂风间歇地席卷火星上的尘云.Violent winds periodically drive clouds of dust around Mars.在稍高一些的流速时,个别的颗粒沿着河床间歇地滚动和滑动.At some higher vel...