?1. beaver是一種半水棲的哺乳動物，屬于鼠科，也被稱為河貍。

2. beaver的讀音為 [biv]，讀作“比弗”。

3. beaver常見于北美和歐洲地區，它們生活在水邊或湖泊附近的濕地環境中。它們通常會用自己的牙齒咬斷樹木來建造水壩和巢穴，以便在水中生活。它們還會利用樹枝和泥土來修補壩堤，以保持水位穩定。除此之外，beaver也是一種重要的森林工程師，它們通過建造壩堤改變了河流和湖泊的形態，影響了整個生態。

4. 例句1：Beavers are known for their impressive dam-building skills.

5. 例句2：The beaver's fur is highly valued for its warmth and water resistance.

6. 例句3：Beavers have a strong sense of family, with both parents taking care of their young together.

7. 例句4：The beaver's teeth never s growing, so they constantly need to gnaw on things to keep them at a manageable length.

8. 例句5：Beavers are considered a keystone species, as their presence has a significant impact on the surrounding environment.

9. 組詞：beaver dam (水壩), beaver lodge (巢穴), beaver pelt (皮毛), beaver tail (尾巴)

10. 中英文對照：beaver - 河貍

11. 簡單總結：beaver是一種半水棲的哺乳動物，它們以建造水壩和巢穴來改變生活環境，被稱為森林工程師。它們的牙齒和皮毛都具有重要的功能，而且具有強烈的家庭觀念，被視為生態中不可或缺的物種。