It is mainly for short-term learners to prepare; therefore the whole set of teaching materials focuses on the practicality.
它主要是为短期学者编写的，所以整套教材着重于实用性。
It is mainly for short-term learners to prepare; therefore the whole set of teaching materials focuses on the practicality.
它主要是为短期学者编写的，所以整套教材着重于实用性。
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