1. Fluctuating wind pressures acting on buildings are complicated functions of both time and space. 作用在建筑物上的脉动风压是一个空间和时间的复杂函数。
2. Green hill slope, and that the fluctuating trees, as well as the vibrant flowers that weeds are all kinds of naughty tricks to play it! 绿色的小山坡上，那一棵棵波涛起伏的树，以及那充满活力的野花野草，正在调皮地玩着各种花招呢！
3. The thesis designs a frequency-power automatical control unit based on PLC, enabling generators to run reliably even if in the event of heavy load fluctuating. 本文设计了一种基于PLC控制的自动调频调载装置，可使发电机组在大负荷波动的情况下也能可靠地运行；
