These maps are being used to test previous results that suggest that dark matter is more densely packed inside clusters than some models predict.
这些图片将会用来测试是否如之前模型所预测的一样，暗物质在某些星系集群里密度更大。
2
You may also be asked to provide references, meet with school officials, or pass a test in the subject matter you are requesting credit for.
他们可能会要求你提供参考，与学校官员见面，或者就你申请学分的方面做一个测试。
3
No matter which persona you use in a test case, the test data will be the same, because the flow of events is the same for the primary and secondary personas.