If it were gentle, only the more unstable rods fell. 若地震是微弱的,仅那些比较不稳定的杆子倒下。
Liable to capsize; unstable. 易于翻转的;不稳定的
Of equipment or an operation, unstable and error-prone; likely to fail or cause difficulty in use. 用于描述这样的设备或操作:它们不稳定并且容易出错;它们可能失效或使用困难。
The learning of the bright student who acquires knowledge with ease and speed is felt to be unstable; easy come, easy go. 聪明的学生学得又快又轻松,但被认为是不牢固的,容易获得也容易失去嘛。