Amazon.com is the world's largest internet company. It started out as an online bookstore in the middle of the 1990s and grew gradually over the years.
2026-02-101.1k 字6 分钟
OPEC is the Organization of Petroleum Exporting Countries.
It was founded in Baghdad in 1960 and currently has 11 members. OPEC's aim is to regulate the amount of oil that member nations produce and to keep prices at a steady rate.
2026-02-091.3k 字6 分钟
Malnutrition（营养不良）
It occurs when a person eats too little or too much, or has an unbalanced diet. In most cases, malnutrition means **undernourishment**, a lack of food and not enough calories. It is widespread in developing countries.
