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2。3。3 句中有非限制性的词或短语之类，以逗号标出以示插入成份： 2. 3. There are unrestricted words or phrases in the three sentences, marked with commas to indicate the insertion components: 1。 Her husband， Bill， is a scientist。 (Bill 为插入成份) 1. Her husband， Bill， is a scientist。(bill is the insert component) 2。 Kent Howard， my English teacher， is from America。 (插入成份 my English 2. Kent Howard， my English teacher， is from America。(insert my English teacher) Teacher) 3。 Her father， who is a famous scholar， teaches English。(插入成份 who is a 3. Her father， who is a famous scholar， teaches English。 (insert who is a famous scholar) 4。 Eleanor， his wife of thirty years， suddenly decided to open her own 4. Eleanor， his wife of thirty years， suddenly decided to open her own 2。3。4 句中的城市名如果和它的省、州、国名并列，省、州、国名前后须加逗号： 2. 3. If the name of a city in the four sentences is in parallel with the name of its province, state or country, a comma must be added before and after the name of the province, state or country: 1。 We visited Hartford， Connecticut， last summer。 (Connecticut 为插入成份) 1. We visited Hartford， Connecticut， last summer。(Connecticut is the insertion component) | 
