be produced of itself

基本解釋

In fast ion-cluster collisions, Na 2cluster ions can be produced with minimum or even no excitation of the cluster itself.
在快重離子與團(tuán)簇作用中，可以得到低激發(fā)態(tài)的團(tuán)簇離子。
Filtering out sinusoidal components of the signal that occur at frequencies that cannot be produced by the music itself results in recording the music with little wind and rain noise.
濾除非音樂(lè)自己産生的那些頻率的信號(hào)的正弦部分能夠使記錄的音樂(lè)中幾乎沒(méi)有風(fēng) 和雨的噪聲。
This second gene, activated whenever the gene for P16INK4A was active, produced a protein that was harmless in itself, but which could be made deadly by the presence of a particular drug.
這第二段基因編碼産生的蛋白質(zhì)對(duì)自身無(wú)害，但在特殊的葯物作用下，它就會(huì)變的很致命，衹要P16INK4A分子有活性它就能被激活。

This second gene, activated whenever the gene for P16INK4A was active, produced a protein that was harmless in itself, but which could be made deadly by the presence of a particular drug.
ECONOMIST: A way to counteract part of the process of growing old