[化] 交变载荷; 交替载荷; 反复载荷

alternating load的用法和样例：

例句

We can assume the load dispersion discontinuity lines.我们可以假设荷载分布的突变线。
The hotel business has its own load factor in the form of the occupancy rate.旅馆业本身的荷载系数由开房率来表示。

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