1 sentence

1. 在19世纪，最初的酱汁完全是由牡蛎和它们的天然肉汤制成的。

   zài19 shì​jì, zuì​chū de jiàng zhī wán​quán shì yóu mǔ​lì hé tā​men de tiān​rán ròu​tāng zhì chéng de.

   In the 19th century, the original sauce was made purely from oysters and their natural broth.

   Source: CCMatrix