https://www.douyin.com/user/MS4wLjABAAAAPSeKMESbuuJM8ZgZ5YxIIgWRSNcaob6r0BwYElgzquk?modal_id=7428556716591058239&relation=0&vid=7331079525461265705
https://www.bilibili.com/video/BV1XjwnezEAF
零件中,单实体与多实体效果不同;装配与零件效果不同;