Classical music originated in Europe. The compositions are formal and the musicians rarely improvise. Classical music groups vary in size from string quartets to symphony orchestras.

古典音乐起源于欧洲。它的作曲非常正式，演奏家很少即席发挥。古典音乐乐队的大小差别很大，小至弦乐四重奏乐团，大到交响乐团不等。

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String quartets, jazz bands, chamber orchestras and folk groups are commonly organized within the colleges, as are literary magazines, newsletters, and photo journals.

学生们常常组合成弦乐四重奏乐团、爵士乐队、室内管弦乐队及通俗组合，这就像文艺杂志、内部简讯和图片期刊一样普遍。

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Most small orchestras have a string bass.

大多数小乐队都配有低音弦乐器。

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Pirekua can be sung solo, in duets or trios, or accompanied by choral groups, string orchestras and mixed orchestras (with wind instruments).

UNESCO: Culture

It is one of very few all-string orchestras in the U.S., although on occasion it will hire a guest to sing or add a new musical sound.

WSJ: All Strings Attached | New Century Chamber Orchestra | By David Littlejohn

About 12 years ago she acted on her dream of learning to play the cello (she had been proficient on the piano) and now is a member of two amateur orchestras and a string quartet.

WSJ: Moving to Israel: An American Couple's Experience