salute/greet/salt/pollute
记忆：
1. salute [ sE5lu:t, -5lju:t ] To greet or address with an expression of welcome, goodwill, or respect v. 行礼致敬, 敬礼 He saluted his friend by a wave of the hand. 他挥手向朋友致意。
2. greet [ ^ri:t] To salute or welcome in a friendly and respectful way with speech or writing vt. 问候, 向. . . 致意 He greeted her by saying ‘Good morning’. 他说“早上好”来问候她。
3. salt [ sC:lt] n. 食盐 The city of Zigong is called the city of salt. 自贡市被称为盐都。
4. pollute [ pE5lu:t, -5lju:t ] vt. 污染 The waste polluted the river seriously. 废物严重地污染了河流。
另类阅读：
How could you greet the president with polluted salt? Is that the way you salute honourable guests?