Canis dirus是拉丁语，意为恐怖的狗。它是北美洲后期更新世的一种已灭绝的猛兽，通常被称为“美洲狮子”。
以下是9个含有Canis dirus的例句：
1. The Canis dirus was one of the top predators in North America during the Pleistocene.（Canis dirus是更新世时期北美洲最顶尖的掠食者之一。）
2. The fossils of Canis dirus show that it had an impressive bite force.（Canis dirus化石表明它拥有惊人的咬合力。）
3. Scientists believe that the Canis dirus hunted in packs.（科学家认为Canis dirus是以群体形式狩猎的。）
4. The Canis dirus was about the same size as a modern grey wolf.（Canis dirus与现代灰狼大小相似。）
5. The Canis dirus was known for its long, powerful legs.（Canis dirus以其长而有力的腿而闻名。）
6. The Canis dirus disappeared from North America around 10,000 years ago.（Canis dirus在大约1万年前从北美洲灭绝。）
7. The Canis dirus is sometimes called the American lion because of its large size and predatory abilities.（由于其巨大的体型和猎食能力，Canis dirus有时被称为美洲狮子。）
8. Canis dirus fossils have been found in many parts of North America, from Mexico to Canada.（Canis dirus化石在北美洲许多地方都有发现，从墨西哥到加拿大。）
9. Some scientists believe that the extinction of Canis dirus may have been caused by competition with other predators, such as the saber-toothed tiger.（一些科学家认为Canis dirus灭绝可能是由于与其他掠食者（如剑齿虎）的竞争。）
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