Objective: To determine the activity of avidin in hens egg white power after heat treatment.

目的：了解经过一定温度处理的蛋清粉中抗生物素蛋白的活性。

youdao

I've gone native and now keep three egg-laying hens in my backyard.

我已经彻底变成了本地人，在后院里养了三只下蛋的鸡。

youdao

The typical cage in today's egg factory holds four or five hens on a 12- by 18-inch floor area.

在今天的鸡蛋工厂，一个典型的笼子大概在十二到十八英寸的面积中养了大约四或五只母鸡。

youdao

New EU legislation will ban the use of battery cages for egg-laying hens from 2012.

BBC: Northern Ireland Assembly

An EU ban on battery cages saw better conditions for egg-laying hens.

BBC: Your highlights of 2012 in drawings

And almost nine in ten of 32m egg-laying hens are kept in cages.

ECONOMIST: Animal welfare: Foxed | The