音标: 英 ['kɒntreɪl] 美 ['kɒnˌtreɪl]
1. Been seeing those contrails for a while.
那凝结尾迹效果持续了好一会儿
2. The moisture in the air and the ship flying through it made the contrails, and a lot of times you wouldn't have them because it depends on the amount of moisture in the air.
飞机从云层穿行而过 就形成了尾迹云 大多数时候尾迹云是无法形成的 这取决于空气的湿度