It can be made fun and it can be made rigorous at the same time (Ben Goldacre's excellent book "Bad Science" is a model of good practice in this respect).
这门课程可以既严格又好玩(Ben Goldacre的优秀作品《糟糕的科学》是这方面实践的典范)。
You can meet people and practice the Spanish language while having fun at the same time.
在享乐的同时你可以见到很多人，并可以练习西班牙语。
I could get the practice session in and also spend some quality time with them. So it's been a fun week.
我能把和家人共聚与训练穿插安排好，所以这一周过的很不错。
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