47. Displays of the aurora borealis, or "northern lights," can heat the atmosphere over the arctic enoughto affect the trajectories of ballistic missiles, induce electric currents that can cause blackouts in some areas and corrosion in north-south pipelines.
to affect the trajectories of ballistic missiles, induce
that the trajectories of ballistic missiles are affected, induce
that it affects the trajectories of ballistic missiles, induces
that the trajectories of ballistic missiles areaffected and induces
to affect the trajectories of ballistic missiles andinduce
供参考： 如果与heat并列，则需要在and前加一个comma.原因如下: from: The American Heritage Guide to Contemporary Usage and Style compound predicates The parts of a compound predicate are not normally separated by a comma except to prevent misreading.
The element was discovered in 1862 and was later used in explosives. We worked hard on the project but could not finish in time. I called the loan officer who left me the message, and asked for more information
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发表于 2008-4-2 22:53:00
