However, some nutritionists advise against switching to a totally strict vegetarian diet.

然而，一些营养学家对转向完全严格的素食食谱表示反对。

21. What do some nutritionists say about a strict vegetarian diet?

21.关于一个严格的素食食谱，一些营养学家说了什么？

We call that a " vegan." Here in Los Angeles, you can go to vegan restaurants where all the food is of this very strict vegetarian kind.

我们称之为“素食主义者” 。在洛杉矶，你可以去素食餐厅， 那里所有的食物都是这种非常严格的素食。

The team found that the shift in toothiness probably corresponded to a shift in diet: these dinosaurs ate anything they wanted as kids, then became strict vegetarians as adults.

研究小组发现，牙齿的变化可能与饮食的变化相对应：这些恐龙小时候想吃什么就吃什么，成年后就变成了严格的素食主义者。

However, some nutritionists advise against switching to a totally strict vegetarian diet. They believe such a diet which includes no products from animal sources can be deficient in many of the necessary vitamins and minerals our bodies need.

然而，一些营养学家不建议人们变成绝对的素食主义者。他们认为这样的饮食不利于人类从动物身上摄取必要的维他命和矿物质。