1·Ice helps to preserve food.
冰有助于保存食物。
2·Summer is difficult to preserve food.
夏天是很难保存食物的。
3·Chinese people know very well how to preserve food.
中国人深明保存食物之道。
4·So they used salt to preserve food and explored the world.
所以他们使用盐来保存食物和探索世界。
5·The ship is equipped with special refrigerating devices to preserve food.
船上有特设的冷藏设备，用来保存食物。
6·In hot weather it is rather difficult to preserve food and keep it fresh and safe to eat.
热天很难保藏食品，使之保持新鲜与食用安全。
7·BHT also prevents oxidative rancidity of fats. It is used to preserve food odor, color, and flavor.
二叔丁基对甲酚(BHT)还能防止脂肪的氧化酸败，被用来维持食品的气味、颜色和味道。
8·It's hard to preserve food fresh and eatable in summer. Naturally many people feel it better not to eat out.
热天很难收藏食物，使之连结新鲜与食用安全。很自然，很多人觉得在夏太阳照射旧不上饭馆为宜。
9·Try to add and extend the knowledge and understand how you can preserve food by doing the CO2 or copper oxide.
尝试去增加和扩展这个知识，去理解如何使用CO2或氧化铜来保存食物。
10·The Psychrophilic bacteria is one of the reasons that cause a variety of harmful effects of low temperature preserve food products.
嗜冷菌广泛存在于低温冷藏食品中，是引起低温食品多种致害的主要原因之一。