1. The flu is one of winter's unwelcomed guess. 流感是冬天的不速之客之一。
2. Have you ever had a feeling, that's like an unwelcomed guest. 你是否有过这样一种感觉,就像一个不受欢迎的客人。
3. The main function of today's wall is to separate possibility unwelcomed outside air from the controlled comfortable conditions of temperature and humidity inside. 现代墙的主要功能是将室内可调控的舒适的湿度及温度与外界令人难受的空气隔离开来。