let down the line in fishing

• 垂纶

let down the line in fishing的用法和样例：

例句

1. Sales of nylon have been below par in recent years.
   近年来尼纶织的销售额一直不及以往。
2. Saran Wrap seals in freshness and seals out odors.
   莎纶这种品牌的塑胶包装纸保住新鲜，除去臭味。