不稳定性

However, ALA could not be produced conveniently and applied widely because of its low stability. So this dissertation will pay attention to the stability of ALA.

但ALA的不稳定性是限制其制备和应用的重要因素，文章在这方面作了一些探索。

This artificially induced plasma depletion can then be used to investigate other space phenomena, such as the growth of the plasma instabilities or the modification of radio propagation paths. The 47 second OMS burn of July 29, 1985, produced the largest and most long-lived ionospheric hole to date, dumping some 830 kg of exhaust into the ionosphere at sunset. A 6 second, 68 km OMS release above Connecticut in August 1985, produced an airglow which covered over 400,000 square km.

这一人工诱导离子损耗之后能够被用于研究其他的太空现象，比如离子不稳定性的增长或者无线电传播通道的改变。1985年7月29日47秒的轨道操纵系统的燃烧产生了迄今为止最大和最长期的电离层空洞，将大约830公斤的废气在日落时倾倒入电离层。1985年8月康涅迪格上空6秒种、68公里的轨道操纵系统的排放产生了覆盖40万平方公里的气辉。

This is a typical case for an RHF/UHF instability

这是一种典型的RHF/UHF不稳定性。

This will also lead to an RHF/UHF instability

这也造成RHF/UHF不稳定性。

The experimental investigations are performed on a three-dimensional boundary layer of a 45 degree swept back fla...

本文对承受横流不稳定性的三维附面层进行了实验研究。

Thus it is important to investigate the unstable properties, much of which can be obtained by employing the MHD model.

这些不稳定性的诸多性质都可用磁流体力学模型进行研究，研究的结果为等离子体实验和天体物理观测中的许多现象提供了直观的认识。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。