A lacto-vegetarian diet includes dairy products but excludes eggs, ovo-vegetarianism includes eggs but not dairy, and lacto-ovo vegetarian diet includes both eggs and dairy products.

奶素食主义者食用奶制品，但是不吃鸡蛋。 蛋素食主义者的食物包括蛋类，但不包括乳制品。 奶蛋素食主义者的饮食既有蛋类又有乳制品。

youdao

While lacto-ovo vegetarians can eat eggs and dairy, vegans don’t eat anything that comes from an animal.

奶蛋素食者可以食用奶类和蛋类，严格素食者则不能吃任何动物性产品。

youdao

When my wife and I first went vegan in 1997 (after being lacto-ovo vegetarian for several years), we each lost 7 pounds in the first 7 days.

当我和妻子1997年第一次成为严格的素食者时(在做了几年的奶蛋素食者后)，我俩在头七天内都减掉了7磅。

youdao