能够在运行时传递查询是某些动态情形(如未知条件)所必需的。

The ability to pass in queries at run time is necessary for some dynamic cases, such as unknown conditions.

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本文运用复合反演的观点研究结构参数未知条件下的地震动反演问题。

By introducing composite inversion ideas, the problem of ground motion inversion is studied in this paper.

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颜色在自然界的一些用途仍然未知，但有一件事是肯定的，颜色不仅使我们的星球变得美丽，也是我们的星球得以生存的必要条件。

Some uses of color in nature remain unknown, but one thing is for sure, color not only makes our planet beautiful but it is also necessary for our planet to live on.

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