아버지를 친근하게 부르거나 예스럽게 이르는 말
an informal or old-fashioned term for one's father
예문:
"My pa taught me how to fish when I was just a boy."
"Pa always said that hard work pays off in the end."
주로 언덕 위에 방책을 둘러 만든 마오리족의 마을이나 요새
a Maori village or settlement, typically a fortified one on a hill
예문:
"The remains of an ancient pa can still be seen on the hilltop."
"The tribe fortified their pa to protect against invaders."
국제 단위계의 압력 단위로 1제곱미터당 1뉴턴의 힘에 해당함
the SI unit of pressure, equal to one newton per square meter
예문:
"The sensor measures the internal pressure in Pa."
"One Pa is equivalent to one newton per square meter."
연설이나 음악을 증폭하기 위해 마이크, 앰프, 스피커로 구성된 전자 시스템
an electronic system comprising microphones, amplifiers, and loudspeakers used to amplify speech or music
예문:
"The principal made an announcement over the PA system."
"We need to fix the PA before the concert starts."
원자 번호 91번인 화학 원소 프로트악티늄의 기호
the chemical element protactinium, with atomic number 91
예문:
"Pa is a dense, silvery-grey actinide metal."
"The atomic number of Pa in the periodic table is 91."