关于这一点，我们既没有完全的服务规范，也不知道服务参与者将会提供什么或者需要什么服务。
At this point, we don't have complete service specifications, nor do we know what service participants will provide or require what services.
至于剩下的参与者，大约有15%在6个月时表现出中等程度的悲痛症状，而在18个月时症状几乎完全消失了。
As for the remaining participants, about 15 percent exhibited grief symptoms that were moderately high at 6 months but almost completely gone by 18 months.
在此期间，我注意到部分参与者的两种完全相反的态度。
During these events, I noticed two types of diametrically-opposed attitudes on the part of participants.
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