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INTERMEDIATE LEVEL
Content
→
→
→
OXF3000ZH:
浓缩
☊
→
提浓
☊
→
☊
→
concentrate
OXF3000ZH:
集中
☊
→
专注
☊
→
浓缩
☊
→
concentration
like: 浓缩
→
→
浓缩 ☊ → 提浓 ☊ → ☊ → 
concentrate 集中 ☊ → 专注 ☊ → 浓缩 ☊ → concentration