noun [抽象名词]招呼，问候
Hello is also a noun. 招呼 • The salesperson greeted me with a warm hello. 那位推销员向我打了个热情的招呼。
verb [vi. 不及物动词]说（或大声说）“喂”；打招呼
Hello, everybody. Hello to you. 大家好，向你问好！
单词造句:
Hello is also a noun. 招呼 • The salesperson greeted me with a warm hello. 那位推销员向我打了个热情的招呼。
Hello, everybody. Hello to you. 大家好，向你问好！