Wide-angle mode will give you more depth of field to get the background clearer.
广角模式会给你更多的景深，以获得更清晰的背景。
The sensitivity of the first four mode shapes to crack location and depth are discussed.
并分析和讨论了悬臂梁前四阶模态对损伤的敏感性。
The sensitivity of the first four mode shapes to crack location and depth are discussed.
并分析和讨论了悬臂梁前四阶模态对损伤的敏感性。
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