求翻译：美国情景喜剧中出现的丰富多样的美式幽默是一个值得研究的现象， 不仅产生使听者“发笑”的效果，也能产生其特殊的交际效果。美式幽默的产生必有其深刻的根源。是什么意思？

The U.S. sitcom variety of American humor is a phenomenon worthy of study, not only to produce the effect is to make the listener laugh ", can also produce special communicative effects. Generation of American humor must have deep roots.

The American scene in the comedy of the rich and diverse American humor is a worthy of study, not only the listeners have a "laugh" effect, but also to produce its special entertainment. American humor will be the result of their deep roots.

In the American scene comedy appears bountifully American humorous is the phenomenon which is worth studying, not only produces causes the listener “laughs” the effect, also can produce its special human relations results.The American humorous production must have its profound root.

United States appear in the sitcom the diversity and richness of American humor is a phenomenon worthy of study, not only makes the listener "laugh" effect can also have their special communication effect. American humor will have their deep roots.

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