crucible, contraption, mirages, prowess, unreflective,

In the first two chapters we have seen how the great difficulties involved in establishing such regularities can be overcome, at least to some extent.

[Inventing temperature - 141p]

Birdgman thus emphasizes that our concepts do not automatically extend beyond the domain in which they were originally defined. He warns that concepts in far-out domains can easily become meaningless for lack of applicable measurement operations.

[Inventing Temperature, - 145]

The operationalist dictum could be phrased as follows: increase the empirical content of theories by the use of operationally well-defined concepts. In the operationalist ethic, extension is a duty of the scientist but unthinking extension the worst possible sin. 

[Inventing Temperature - 147p]

crucible: 

1.(쇳물을 녹이거나 하는) 도가니

2.(격식 또는 문예체) (흔히 새로운 것을 창조해 내는 과정에서) 호된 시련의 장

a pot in which metals or other substances are heated to a very high temperature or melted

: a difficult test or challenge

: a place or situation that forces people to change or make difficult decisions

1. He's ready to face the crucible of the Olympics.
2. His character was formed in the crucible of war.

contraption: (기묘한) 기계[장치], 희한한 기계 장비

: a piece of equipment or machinery that is unusual or strange

1. The people wondered how the contraption worked.
2. <built a contraption for automatically buttering toast>

prowess:  great ability or skill, (격식) (절묘한) 기량[솜씨]

1. He is known for his prowess on the football field.
2. their naval and military prowess

reflective: 

1. (격식) 사색적인

a quiet and reflective man

조용하고 사색적인 남자

2.빛[열]을 반사하는

reflective car number plates

빛을 반사하는 자동차 번호판

On dark nights children should wear reflective clothing.

어두운 밤에는 아동들이 빛을 반사하는 옷을 입어야 한다.

3.~ of sth …을 반영하는, … 의 속성을 보여주는

His abilities are not reflective of the team as a whole.

그의 능력이 그 팀 전체를 반영하는 것은 아니다.

Everything you do or say is reflective of your personality.

당신이 말하고 행동하는 모든 것이 당신의 인격을 반영한다.

 causing light, sound, or heat to move away : reflecting light, sound, or heat

: relating to or caused by light that reflects off a surface

: thinking carefully about something

1. the reflective glare of the shiny metal
2. She was in a very reflective mood.
3. 
   
4. mirages.
5. 1. 신기루
   2.신기루 같은[헛된] 것

   His idea of love was a mirage.

   사랑에 대한 그의 생각은 신기루와 같았다.