当然，这只是一方面，肉类和牛奶制造了人体每天所需热量的15%，如果素食，我们需要吃更多的食物补充这部分能量。

That's only part of the story, of course: meat and milk make up about 15 per cent of calories eaten by humans, so we would need to eat more grain to compensate for their loss.

youdao

我是素食主义者，只食用瘦植物蛋白。这部分蛋白主要来自豆类和坚果。

As a vegetarian, I eat lean vegetable protein - lots of soy protein and beans and nuts.

youdao

首先，昆虫不能成为纯素食的一部分，而昆虫很可能是多数灵长类动物饮食中b 12的主要来源。

Firstly, insects cannot be part of a vegan diet and are probably the key source of B12 in most primate diets.

youdao