Background and Objective: Cancer is one of the most primary causes of death for children.
背景与目的：恶性肿瘤是儿童死亡的主要原因之一。
Background and objective Breast cancer is one of the most common malignant tumors in women.
背景与目的乳腺癌是女性最常见的恶性肿瘤之一。
The objective reasons of this change is the social and humanity background of that time.
而促使其发生转变的客观原因，则在当时的社会及人文背景。
Objective: To study the effect background and color education on color matching.
目的：寻找适合临床的最佳比色背景，评价色彩培训对比色效果的影响。
First, the thesis describe the study background and study method, then put forward the objective.
论文首先对研究背景、研究方法等进行了简单阐述，提出了研究目的。
First, the thesis describe the study background and study method, then put forward the objective.
论文首先对研究背景、研究方法等进行了简单阐述，提出了研究目的。
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