abbr.Office of Space Sciences <美>航天科学局;
英文例句/中文翻译:
1、
方法:选取120例根尖周刮治术的患者随机分为2组:实验组65例,术后使用BIO-OSS骨粉充填骨腔;
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2、
目的:探讨BIO-OSS骨粉促进根尖周手术骨缺损修复的临床效果。
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3、
Older OSs like MS-DOS, for example, allowed programs to access hardware resources directly.
一些老版本的操作系统,如MS-DOS,允许编程人员直接访问硬件。
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