习作根据其功能可分为练习性、草稿性和试验性几种。练习性的习作专为训练基本技巧而作，草稿性的习作指为最后完成作品所作的准备性作品，称草图。试验性的习作指艺术家为探索新的表现技巧而作。此外，为创作准备的各类写生材料亦称习作。 小学生课堂所要求的习作，应该是指根据范文写一篇简文，练习相应的描述方法，以提高写作的技窍的训练手段
我开始练习作者在书中提到的各种实践步骤，并开始反对那些过于忙碌的想法。
I started practicing the various practical steps mentioned by the author in the book, and began to revolt against the very idea of being too busy.
大学能帮助培养全球劳动力的最显著方式是：鼓励学生把在海外学习作为课程的一部分。
The most obvious way universities can help develop global workforce is by encouraging students to study abroad as part of their course.
至于米勒在过去六个星期里创作的大量的速写和习作，嗯，如果你知道我们现在销售它们的价格，你会大吃一惊的。
As for the bushels of sketches and studies which Millet produced in the last six weeks, well, it would astonish you to know the figure we sell them at nowadays.
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