文中对铜铝复合罩在射孔弹上的应用进行了理论及试验上的研究。
The Cu-Al bimetallic liner used in perforating shape charge is studied theoretically and experimentally.
随着股票市场一时受公司利润反弹的利好消息的刺激,一时又受到投资者担心经济复苏的可持续性的影响,股票市场一会儿反弹上攻,一会儿又震荡下行,如此再三。
Equity markets repeatedly rallied and then faltered as they alternately took heart from the strength of corporate profits and fretted over the sustainability of the economic recovery.
我们一聊几个小时,然后静静地想各自的心事,或者她给我弹上几小时的钢琴。
We talked together for hours, were silent, thinking each our own thoughts, or she played for hours to me on the piano.
Having said that, let's assume that we do have the slower tempo here, one--Let me play a little bit at the piano.
说完这些,假设我们运用较慢的速度,一,我还是在钢琴上弹一下
What we've done is taken this pitch and played it all the way down an octave below it so we're actually getting back to this configuration of the pitch right next to it, and we could--then of course we could go down one more step and we would get the octave, which is a duplication of two-to-one.
我们所做的是固定一个音高,向下一路弹奏一个八度,所以事实上我们又回到了与这个固定音高相邻的音上,我们当然也可以向下再弹一组,然后得到这个八度,这其实就是两个八度对一个八度的重复。
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