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1.Moderate sexual activity increases levels of a compound in the body called IgAthat binds to bacteria and triggers the immune system to destroy them. “Bind”有“束缚,限制”的意思,但在这里是“使结合”的意思(后面的“to”是介词)(《新英汉词典》85年版P111),为及物动词。从句的含义是“(IgA)thatbinds itself to bacteria…”。当作不及物动词时,“bind”则无此义。“them”指“bacteria”。“Bind A(to B);bind A and B(together)”的字面意思是“to tie or(asten,eg with rope”(见“ OXFORD ADVANCED LEARNER’SDICTIONARY”4TH EDITION P107)。所以,此句可译为:
1. Moderate sexual activity increases levels of a compound in the body called IgAthat binds to bacteria and triggers the immune system to destroy them. “Bind” has the meaning of “binding, restriction,” but here is the meaning of “combination” ( The following “to” is a preposition.) (“New English-Chinese Dictionary”, 85th edition, P111). It is a transitive verb. The meaning of the clause is “(IgA)thatbinds itself to bacteria...”. When used as an intransitive verb, “bind” has no such meaning. “Them” refers to “bacteria.” “Bind A(to B);bind A and B(together)” literally means “to tie or(asten,eg with rope” (see “OXFORD ADVANCED LEARNER’SDICTIONARY” 4TH EDITION P107). So, this sentence can be Translate to: