Tutoring Online' is moderately difficult with strong practicability and authority.
这门课难易适中，具有很强的实用性和权威性。
The whole system is built on visual route chart with convenience operation and strong practicability.
整个系统的操作建立在可视化的全路线路图上，操作直观方便，实用性强。
The whole system is built on visual route chart with convenience operation and strong practicability.
整个系统的操作建立在可视化的全路线路图上，操作直观方便，实用性强。
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