bark|barked|barking|barks
他们听到外面有狗在叫。
They heard a dog ___barking outside.
每当有陌生人来我们家，它就会叫。
He ___barks whenever there is a stranger in our house.
邻居家的狗整晚都在叫。
The neighbour's dog ___barks all night.
某些昆虫生活在橡树粗糙的树皮下。
Certain insects live beneath the rough ___bark of oak trees.
史前人类通过有节奏地敲击树皮来进行交流。
By hitting the ___bark of trees rhythmically, prehistoric humans communicated.
厚厚的树皮保护树木免受森林火灾的侵害。
The thick ___bark protects the tree from forest fires.
厚实的保护性树皮有助于树木在森林火灾中存活。
The thick, protective ___bark helps the tree survive forest fires.
桦树的树皮是白色的。
The ___bark of the birch tree is white.
当害怕时，狗可能会凶猛地叫。
When scared, a dog may ___bark aggressively.
经理在压力大时，往往会朝下属咆哮。
The manager tends to ___bark at his subordinates when under pressure.
命令在一片嘈杂的仓库地面上被吼了出来。
Orders were ___barked across the noisy warehouse floor.
教官吼出一道命令，新兵们立刻行动起来。
The drill sergeant ___barked a command, and the recruits sprang into action.