Operational maintenance
[计] 运行维护
🧩 词语组成解析
🗣️ 情景例句
Between the woods and frozen lake
就在林子和冰湖之间
Yesterday will not be called again.
光阴一去不复返。
Sometimes it snows, and the land is all white. Then we go skating.
有时会下雪，地面白茫茫一片。那时我们就去滑冰。