English-Chinese/Mackerel preservation is not simple

Mackerel preservation is not simple. Before the 19th-century development of canning and the widespread availability of refrigeration, salting and smoking were the principal preservation methods available.

鲭鱼保鲜并不简单. 在19世纪的罐头开发和冷藏的广泛应用之前，腌制和熏制是可用的主要保存方法.