用低杂波的可近性条件、参量不稳定性条件和功率耦合谱分析了低杂波电流驱动（LHCD）。
The conditions of wave accessibility and parameter decay instability are used to analyse the density limit in LHCD.
作为一个例子，还讨论了弱重力场情况下激发流动重力模不稳定性的临界条件。
As an example, the critical condition for the streaming gravity mode instability is discussed in a weak gravitational field.
在适当的条件下，重力波能触发交换不稳定性。
It is shown that the gravity waves can initiate the interchange instability under some conditions.
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