certain ['sə:tən]

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adj. ijһ����Ȼ�ģ�ȷ�ţ����ɵģ��а��յ�
pron. ij��ij����

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a. sealed��sure

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a.   incertain��uncertain��unsealed��unsure

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1. Stress prompts the body to produce certain stress hormones.
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2. In certain areas of North China there was also the risk of attack by bandits who preyed on unsuspecting travelers.
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3. As far as the laws of mathematics refer to reality, they are not certain; as far as they are certain, they do not refer to reality.
����ѧ�������漰��ʵ�����ж��ԣ������Dz�ȷ���ģ������ǵ�ȷ������˵�����ǾͲ����漰����ʵ�����С�

ӢӢ����

adj.
  1. definite but not specified or identified
  2. having or feeling no doubt or uncertainty; confident and assured
  3. established beyond doubt or question; definitely known
  4. certain to occur; destined or inevitable
  5. established irrevocably
  6. reliable in operation or effect
  7. exercising or taking care great enough to bring assurance

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Certain
ij��ijЩ��ȷ���ģ�һ����; ȷ����; ȷ���; ȷʵ;
make certain
(�ѡ�)Ūȷʵ��Ū���; ȷ��; Ūȷʵ������; Ū���;
a certain
ijһ; ijһ��(�ӿ������ʵ���); һ����; һ��;
certain areas
ij����; ij��;
certain knowledge
׼ȷ��֪ʶ; ��ȷ��֪ʶ;