Because of this instability, it's very difficult to store elements as Stark does in his arc reactor: They need to be moving at nearly the speed of light.
由于这种不稳定性，人类很难做到像斯塔克那样将新元素储存在他的方舟反应堆中，再说电影中它们还需以接近光速被移动。
Appointments have been made and unmade with bewildering speed, which has contributed to an unwelcome appearance of instability.
委任的职位像走马灯一样换了又换，最终造成了些许的不稳定。
The wet and warm degree in middle troposphere is weakened and the convective instability in lower middle troposphere is strengthened by increasing wind speed of southern flow.
对流层低层南风气流的加强，可影响对流层中层的暖湿程度减弱，从而加强了对流层低-中层内的对流性不稳定。
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