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(1)The samples[,]which weighed over 10g[,]were heated.在此例句中用逗号和不用逗号两种情况的意思是有很大差别的.若用逗号,两逗号内的从句为非限制性定语从句,此从句提供补充的信息.这样一来整个句子的意思是“样品的重量超过10克,都被加热了”.若不用逗号,该从句为限制性定语从句,它与主句的关系密切.因而整个句子的意思是“只有那些重量超过10克的样品被加热了.”(2)Police fired on the crowd [,] killing fourprotesters.在此例句中用逗号与否两者的意思有很大差别.若不加
(1) The samples [,] which weighed over 10g [,] were heated. In this example sentences with commas and commas are two meanings are very different. If the comma, the two comma clause is not The restrictive attributive clause, which provides supplemental information, so that the meaning of the whole sentence is “the sample weighs more than 10 grams, are heated.” If you do not comma, the clause is a restrictive attributive clause, it and the main clause The meaning of the whole sentence is “only those samples weighing more than 10 grams are heated.” (2) Police fired on the crowd [,] killing fourprotesters. There is a big difference