In order to find out quick eggshell crack detection nondestructively for on-line application, frequency responses of an egg excited with a light mechanical impact at different locations on the eggshell were studied.
结果表明:敲击赤道不同的部位,完好鸡蛋各点的特征响应频率十分接近,而壳裂鸡蛋差别较大。
A similar board used as a percussion instrument.
敲击板用作打击乐器的一种类似的板
He tapped his foot on the floor impatiently.
他不耐烦地用脚轻轻地敲击地板。
She tapped on the glass partition and the car stopped.
她轻轻敲击玻璃隔板, 汽车便停了下来。
One that raps or strikes, especially a door knocker.
敲击者敲击或打击的人，尤指敲门者
A knocking or tapping sound.
敲击声敲击或叩击发出的声音
He would hammer a nail into the wood with a series of blows that continued to down long after the head was flush with the boards.
他老是连续不断地锤击，把钉子敲进木头，而且钉头与板面平齐之后，还是一个劲儿地敲。
My Lords," he said, his boots echoing on the tiled floor as he crossed the room.
先生们，”他说道。他穿过屋子，他的靴子敲击着花砖地板发出了回音。
Flat clappers made of bone or wood originally used by the end man in a minstrel show.
打拍者巡游演出中站在一端敲击骨制或木制响板的人
To strike(a bell) to produce music.
敲击敲击（一只钟）从而奏出音乐
The staccato of the dancer's heels against the floor, and the sharp bursts of clapping punctuate the singer's haunting wail.
舞蹈者的脚后跟断续地敲击着地板，伴随着响亮的击掌声，更加深了演唱者萦绕的悲叹。
two paddles hinged together; used by an actor to make a loud noise without inflicting injury when striking someone.
两块板系在一块；演员用的当敲击时不能造成伤害且能制造大的声响的板状物。
The sound of a sharp tap on a hard surface;a rap.
敲击声在坚硬的表面上的急促敲击的声音；敲击声
To hit, especially repeatedly, with or as if with a hammer; pound.
锤击，击敲打，尤指连续地用锤子敲打或好象用锤子敲打；连续猛击
Knock. Opens locked or psionically locked doors.
敲击术：敲开锁或以灵能锁住的门。
A quick, light blow or knock.
轻敲，轻叩快速、轻轻的打击或敲打
sound the wheels of a train,ie by striking them
敲击火车车轮进行检查.
She banged the keys of the piano.
她用力敲击钢琴键。
A pulsation produced by beating.
振动敲击产生的振动