The train station was packed solid with people.

火车站上人挤得水泄不通。

《柯林斯英汉双解大词典》

The car park was absolutely packed solid with people.

停车场被人挤得水泄不通。

youdao

Solid-fuel rockets, in which the fuel and oxidiser are pre-mixed into a stable, solid propellant and then packed inside the case of the rocket, are simpler, lighter and relatively safer.

固体燃料火箭发动机的构造更简单、分量更轻，而且相对更安全。 在固体燃料火箭发动机里，燃料和氧化剂被预先混合成稳定的液态推进剂，然后被塞满火箭发动机的燃料箱里。

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Above the park, perched on a steep ridge, is an area about ten blocks square, packed solid with hotels, casinos, souvenir shops, observation towers and franchise restaurants.

NPR: Excerpt: 'Inventing Niagara'

The eerie emptiness of Trafalgar Square is contrasted in the Times with a picture from 24 hours earlier when it was packed solid with cheering, flag waving crowds celebrating news of London's successful Olympic bid.

BBC: 10 THINGS WE DIDN'T KNOW THIS TIME LAST WEEK

Getting to that stage might mean combining self-assembly methods with lithography, or doing away with the head that reads the data-packed disk and instead creating a self-assembling solid-state system on the model of Flash memory storage used today.

FORBES: Magazine Article