But when Rome collapsed in the fifth century and the Middle Ages began, direct trade of spices stopped, and so did that kind of hands-on knowledge of travel and geography.
但到了5世纪,罗马帝国崩塌了,中世纪开始了,香料直接贸易停止了,所以人们对于香料的运输和来源地的直接认识也就中断了。
These students need to build skills and knowledge during college if they are to use their degrees as a stepping-stone to middle-class mobility.
如果这些学生想把学位作为进入中产阶级的垫脚石,那么他们需要在大学期间积累技能和知识。
Whether in primary school or middle school, we study nothing but basic knowledge.
由小学到中学,所修习的无非是一些普通的基本知识。
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