When it comes to ‘tomato sauce’ and ‘tomato ketchup’, we often consider them the same, but actually, they are not.
说到tomato sauce和tomato ketchup，我们通常认为它们是一样的，但实际上它们不是。
If we go by the food historians, ketchup is a sauce. Ketchup word originated from Chinese 'koechiap' meaning ‘brine of fish’, or generally mentioned as ‘spicy sauce’. The word 'sauce' is derived from Latin word salsas that means ‘salted’.
如果我们从食物历史学的角度来看，ketchup(番茄酱)是一种酱料。番茄酱这个词来源于中国的“腌鱼汁”，意思是鱼的卤水，通常也被称为辣酱。“sauce”这个词则来源于拉丁语salsas，意思是咸的。
According to historians, the sauce was actually invented for many reasons. It served the purpose of a cooking medium and was looked as a meat tenderizer and had the capability of enhancing the flavours too.
根据历史学家的说法，sauce酱汁的发明有很多原因。它是一种烹饪半成品，被认为是一种肉类嫩化剂，也有增强味道的租用。
And interestingly, there was no fixed recipe for this multi-functional dish, so its type and taste differs from culture to culture.
有趣的是，这道有很多功能的菜并没有固定的食谱，所以它的种类和口味因文化而异。
With the commercialization and experimentation, the sauce is now a very household thing and many people make various types of sauces at home.
随着商品化和实验的进行，sauce(酱)现在已经成为一种非常常见的东西，许多人在家里制作各种酱汁。
The sauces can be of various viscosities which depends on the usage of the sauce. For instance, the sauce used for cooking will have less viscosity while the one used for dressing will have high viscosity.
sauce可以有各种粘度，这取决于酱汁的使用。例如用于烹饪的酱汁粘度较小，而用于调味的酱汁粘度较高。
Ketchup is made with tomatoes, sugar, vinegar/acetic acid and spices. Whereas, tomato sauce is made from tomatoes, oil, meat or vegetable stock and spices. It never uses vinegar. Also, ketchup is cold in nature and is never served hot, while all varieties of sauces are served hot.
Ketchup(番茄酱)是由番茄、糖、醋(醋酸)和香料制成的。然而，tomato sauce(番茄酱汁)是由西红柿、油、肉或蔬菜高汤和香料制成的。它从不用醋。此外，番茄酱是冷的，从来不是热的，而各种酱汁都是热的。
To make it simpler, ketchup is made with a variety of spices while the sauce is generally made without spices. Another major point of difference between the tomato sauce and ketchup is, sauce generally does not contain sugar while ketchup has a specific amount of sugar and other sweet spices.
为了简单起见，ketchup是用多种香料制成的，而sauce通常不加香料。tomato sauce和ketchup的另一个主要区别是，sauce一般不含糖，而ketchup含有一定量的糖和其他甜香料。
今天的内容都学会了么?
欢迎评论交流心得~
