复数： knockers
易混淆的单词： Knocker

He began to work on the knocker .

他又开始逐户推销。

He banged on the doorbell impatiently , as if it was a door knocker thing .

他不耐烦地敲上了门铃，好像它是一个门环的事。

The totem of the front door is the knocker , a mechanism which announces arrival and allows the visitor to engage with the building .

房屋前门的图腾是门环，它宣告客人的到来，并使得来访者与建筑产生接触。

He used the knocker vigorously . Nothing happened . He banged away even harder .

他用力打门环。没有人来开门。他砰砰砰砰敲得更响了。

Live cattle are referred to as " beef , " the animals as having " come in to die , " while the employee who must fire the bolt into each quaking cow 's skull is a " knocker . "

活牛被称为”菜牛“，对“将要歇菜”的动物的叫法，而那些员工们必须火烧已经颤颤发抖的牛的头盖骨是“敲击者”。