在悬架所受垂直载荷一定时，悬架刚度越小，则悬架的垂直变形越小，汽车的固有频率越低。
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Jewelry and lace are mostly____ belongings.
Glasses are _____ and must be handled with great care.
They took the phone off the hook so no calls would_____ them.
The coffee is so full that it might_____ over.
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