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.
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。
3
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.