Because of its dense nature, a large mass can be formed into a small space, minimizing air drag and reducing energy loss.
由于其密集性质，一个大集体，可形成一个小空间，减少空气阻力，减少能源损耗。
Because of its dense nature, a large mass can be formed into a small space, minimizing air drag and reducing energy loss.
由于其密集性质，一个大集体，可形成一个小空间，减少空气阻力，减少能源损耗。
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