They had been going full speed with activities since 7:30 a.m., including a field trip to the New York Hall of Science in Queens.

他们从早上7：30开始就忙碌地奔波于各种活动间，其间还考察参观了皇后区纽约科技馆。

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It was a type of merchant vessel known as luxury liners or speed queens as they were once called.

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