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sit up

[phrasal verb]
: to stay awake until late at night熬夜
: to sit with your back very straight坐直
sit up or sit (someone) up : to move or help (someone) to move into a sitting position(使)坐起来
⇒ Main Entry: sit

sit-up

1 ENTRIES FOUND:
sit-up /ˈsɪtˌʌp/ noun
plural sit-ups
sit-up
/ˈsɪtˌʌp/
noun
plural sit-ups
Learner's definition of SIT-UP
[count]
: an exercise in which you lie on your back and use your stomach muscles to raise the top part of your body to a sitting position仰卧起坐
compare 2crunch 4

See also: sit-up


sit-up

1 of 2

noun

: a conditioning exercise performed from a supine position by raising the torso to a sitting position and returning to the original position without using the arms or lifting the feet

sit up

2 of 2

verb

sat up; sitting up; sits up

intransitive verb

1
a
: to rise from a lying to a sitting position
b
: to sit with the back erect
2
: to show interest, alertness, or surprise
sit up and take notice
3
: to stay up after the usual time for going to bed

Word History

First Known Use

Noun

1900, in the meaning defined above

Verb

13th century, in the meaning defined at sense 1a

Time Traveler
The first known use of sit-up was in the 13th century
sit upADVERBabruptly, quickly, suddenly突然坐起來immediately立即坐直slowly慢慢坐起身She slowly sat up and looked around.她慢慢坐起來環顧四周。straight坐正PHRASESsit up and take notice (figurative) 關注起來;警覺起來Their actions have forced us to sit up and take notice.他們的行為迫使我們警覺起來。

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