2018-12-31

1)对中国学生来说,英语中的双元音(diphthong)很难掌握。

English diphthongs are particularly problematic for Chinese students to master.

2)例子: 高峰出行不便,所以选择地铁。

场景 : Driving in rush hours can be problematic, so i choose to take subway.

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