주기율표의 제1족에 속하는 알칼리 금속 원소인 나트륨의 기호.
The chemical symbol for the element sodium.
예문:
"The symbol Na comes from the Latin word natrium."
"Sodium is represented by the symbol Na in the periodic table."
서식 등에서 특정 항목이 해당 사항이 없음을 나타내는 약어.
An abbreviation used to indicate that a specific field or question is not applicable.
예문:
"Please write NA if you do not have a secondary phone number."
"The applicant marked the 'spouse' section as NA."
북미 대륙을 간단히 줄여 이르는 말.
A common abbreviation for the continent of North America.
예문:
"The company has several branches located across NA."
"NA consists of countries including Canada, the US, and Mexico."
스코틀랜드 영어에서 '아니' 또는 '않다'의 의미로 쓰이는 방언.
A dialectal variant of 'no' or 'not' used in Scottish English.
예문:
"Na, I canna do that for you right now."
"He said na when asked if he wanted to leave."
광학계가 빛을 받아들이거나 방출할 수 있는 각도의 범위를 나타내는 척도.
A measure of the range of angles over which an optical system can accept or emit light.
예문:
"A higher NA allows for better resolution in microscopy."
"The NA of the lens determines its light-gathering ability."