

한 세기 전에는 남극에 가기 힘들었어요.
[han seki t͡ɕʌnenɯn namkɯke kaki himtɯlʌs͈ʌjo.]
A century ago, it was hard to get to Antarctica.
이 배는 몇 세기에 만들어졌어요?
[i pɛnɯn mjʌt͡ɕʰ sekie mantɯlʌt͡ɕjʌs͈ʌjo?]
In which century was this ship built?
지난 세기에는 비행기 여행이 어려웠어요.
[t͡ɕinan sekienɯn piɛŋki jʌɛŋi ʌljʌwʌs͈ʌjo.]
In the last century, air travel was difficult.
"세기" is in the lesson "Adventures" (Level 36), along with 15 other useful words. LinDuo has 180 topic lessons like this one, 2,380 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.