快d入黎幫我譯英文丫唔該(10marks!!)超急!!!!!!!要撮要，每篇不多於30words

The kettledrum is by a resonance box above the tying tight calf skin perhaps the revertex system cheek.The surface belays by the wood circle fixed secondary metal link.No matter were the ancient times finger control type or the modern footboard -like kettledrum all has the same range and the acoustic fidelity.The kettledrum usually take two above as a group, when the performance uses front two to wrap the felt wooden brake drum stick, basically plays the law to have Shan Zou and to roll commonly used plays. The xylophone is the different length and the thickness hard plank, according to the scale arranged in order on a frame, actually the sound approximately compared to records the spectrum high eight degrees.If installed one underneath the plank to be possible to adjust the pitch the resonating tube, when performance entangled the line to strike the mallet to strike, the timbre could because of strike the mallet head the material to be different and to be different, has wooden, types and so on rubber and felt.

Rail Kum tectonic theory and xylophone the same, only hard wood for home audio system into steel plates, with small mallet percussion sounds, voices轻脆, Yin Yu short, no certain range, two small eight degrees, the three major VIII.

This refers to the bell-Ming Ming musical instruments and musical instruments membrane combination of instruments. The bell is a different length of metal pipe hanging in a rack on the range there is a 1.5-8.30 8.30 degrees and two degrees, with a chromatic, recital by Kum mallet percussion when the bell sounds to the top