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长篇杂志文章以及有深度的书籍也是上佳选择。
Long journal articles and in-depth books are good, too.
youdao
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阅读有深度的书籍可以开阔眼界，请尝试一下吧！
A few hours of intellectual reading could open up your horizons so give it a shot.
youdao
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阅读有深度的书籍可以开阔眼界，请尝试一下吧！
A few hours of intellectual reading could open up your horizons so give it a shot.
youdao