ascertain
英 [,æsə'teɪn]
美['æsɚ'ten]
	    - vt. 确定;查明;探知
 
英英释意
- 1. after a calculation, investigation, experiment, survey, or study;
 - "find the product of two numbers"
 - "The physicist who found the elusive particle won the Nobel Prize"
 
- 2. be careful or certain to do something; make certain of something;
 - "He verified that the valves were closed"
 - "See that the curtains are closed"
 - "control the quality of the product"
 
- 3. find out, learn, or determine with certainty, usually by making an inquiry or other effort;
 - "I want to see whether she speaks French"
 - "See whether it works"
 - "find out if he speaks Russian"
 - "Check whether the train leaves on time"
 
- 4. learn or discover with certainty