人们曾提出各种不同的系统来生产以蛋白质为主的非传统食物。

A variety of systems have been suggested for the production of unconventional foods, primarily protein.

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而农业也面临着各种挑战：在2050年，我们需要用同样的资源生产两倍的食物喂养90亿的人口。

Also, the agricultural industry is facing many challenges: by 2050, we will need to produce twice the amount of food that we produce today with the same resources to feed 9 billion people.

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而农业也面临着各种挑战：在2050年，我们需要用同样的资源生产两倍的食物喂养90亿的人口。

Also, the agricultural industry is facing many challenges: by 2050, we will need to produce twice the amount of food that we produce today with the same resources to feed 9 billion people.

youdao