西瓜：夏日解暑神器 西瓜是夏季最受欢迎的水果之一，含有丰富的维生素A、B、C以及钾、磷、钙等矿物质。它不仅能够清热解暑、生津止渴，还能利尿除烦，缓解暑热带来的不适。记住，西瓜性寒，脾胃虚寒者要适量哦！

Second, we use pick up informally to describe buying something. For example: I often pick up some milk on my way home. Third, we use pick up to describe getting an illness. I think I picked up a cold.