The reef provides essential food and shelter for marine life.

珊瑚礁为海洋生物提供必不可少的食物和庇护所。

Travel is essential the way books and hugs are essential. Food for the soul.

旅行之必要就像书本和拥抱之必要，是心灵的粮食。

And bread is an essential staple food in many countries – eaten several times a day.

在许多国家，面包是一种必不可少的主食，每顿饭均可享用。

An official said the curfew imposed over the weekend was lifted for two hours to allow people to buy essential food items.

一位官员称周末实施的宵禁已被取消两小时，目的是让人们购买重要的食物。

Step 5 Add chopped celery, sliced onion, a scallion, or grated cabbage to foods you already like to nurture your fondness for this essential food group.

向你原本打算大快朵颐的食物中加入细芹菜，洋葱片，大葱或切碎的包菜。