完善的定级与单元测试系统和个性化的难易自动调整系统，塑造你英语学习的信心。
Perfect grading, unit testing system, and auto adjustment system set for individuals of different language levels, help build your confidence in learning and speaking.
尽管很难看出两幅图片之间的区别，但是仍然对画面进行调整，确保每个人面临的难易程度都是一样的。
Although it was hard to tell the difference, the pictures were adjusted to make sure that no-one found the task harder than anyone else.
依照孩子的年龄调整问题的难易度，帮助孩子学习表达需求。
Adjust the difficulty of the questions according to your child's age so that he may learn to express his needs.
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