However, usually CVI happens bilaterally, meaning on both sides of the body, as opposed to one side, as with lymphedema.

然而，与淋巴水肿常发生在肢体一侧不同，通常CVI发生在双侧，导致血液在静脉淤积。

Early diagnosis of lymphedema is difficult because there aren't many obvious signs, and it can sometimes mimic chronic venous insufficiency, or CVI, where blood collects in the veins.

淋巴水肿的早期诊断较为困难，原因是该病并没有很多明显的体征，并有时可能会与慢性静脉功能不全（CVI）相混淆。

According to the National Center of Biotechnology information and CVI, this study showed people tend to experience positive emotions such as joy or love more often than negative ones.

根据美国国家生物技术信息中心和 CVI 的说法，这项研究表明人们更倾向于体验积极的情绪，如喜悦或爱，比消极的情绪更频繁。