certain ['sə:tən]

英汉解释

adj. 某一；必然的；确信；无疑的；有把握的
pron. 某些；某几个

同义词

a. sealed，sure

反义词

a.   incertain，uncertain，unsealed，unsure

参考例句

1. Stress prompts the body to produce certain stress hormones.
压力促使身体产生一定的压力荷尔蒙。
2. In certain areas of North China there was also the risk of attack by bandits who preyed on unsuspecting travelers.
在中国那里北部的某区域中也是藉着在无怀疑的旅客身上捕食的强盗攻击的危险。
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.
就数学规律能涉及现实生活中而言，他们是不确定的，就他们的确定性来说，他们就不能涉及到现实生活中。

英英解释

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

网络释义

Certain
某，某些，确定的，一定的; 确定的; 确凿的; 确实;
make certain
(把…)弄确实，弄清楚; 确信; 弄确实，查明; 弄清楚;
a certain
某一; 某一个(接可数名词单数); 一定的; 一定;
certain areas
某些地区; 某些地;
certain knowledge
准确的知识; 正确的知识;