bark
单词辨析：
主要指狗、狐、松鼠等吠、叫；除此之外，还可以指人发出短促清脆的轰响。
The black dog barked at a stranger.
那条黑狗对着一个陌生人叫。
The girls barked with laughter.
女孩子们哄然大笑。
指狗或狼连续不断地叫，声音低沉，尤指在追捕猎物时狂叫。
Dogs bayed at the moon.
狗对着月亮狂吠。
The hounds were baying as they followed the escaped prisoner.
警犬一边叫一边追逃犯。
指狗高声吠叫，作此义解时常可与 bark 换用；也可指狗等动物低声吼叫。
The dog growled/barked at the stranger.
狗朝着那个陌生人狂吠。
Her dog growled at me.
她的狗冲我低声吼叫。
指狗等动物发怒时从牙齿间低声发出吼叫，常可与 growl 换用。
The dog snarled/growled at me.
这条狗对着我龇牙咧嘴地狂叫。
The dog never snarled/growled unless it was mistreated.
除非受到了虐待，这只狗从不发怒。
相关例句：
European birch with silvery white peeling bark and markedly drooping branches.
欧洲的一种桦树，有银白色脱落树皮和下垂的枝条。
Cocks crow and dogs bark.
鸡叫狗咬。
Pitch bleeds freely from break in the bark.
树脂从树皮的裂口自然地流出来。
And I also know that the tree's fruit, leaves and bark are all valuable medicinal materials.
而且我知道银杏树的果实、树叶、树皮都是珍贵的药材。
Shrubs or small trees having aromatic bark; the eastern United States and eastern Asia.
灌木或小型乔木具有芳香的树皮；产于美国东部和亚洲东部。
It takes the bark of three whole trees to make enough of the drug to treat a single patient
单是治疗一个病人，就需要三棵树的全部树皮来制取这种药。