In the last few years, this art has made a big leap.

近几年来，这一艺术有了新的跃进。

《新英汉大辞典》

January 21 is the 21st day of the year in the Gregorian calendar. There are 344 days remaining until the end of the year (345 in leap years).

1月21日是阳历年的第21天，离一年的结束还有344天(闰年是345天)。

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January 13 is the 13th day of the year in the Gregorian calendar. There are 352 days remaining until the end of the year (353 in leap years).

1月13日是阳历年的第13天，离一年的结束还有352天(闰年是353天)。

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The students were brought into this course were in that interesting gap in the professions where they have been with the company for a couple of years but will probably be four more years before they consider for the big leap, for the big advancement.

参与该课程的学生,职业差别很大,他们还会在,现在的公司待几年,甚至可能在考虑,跳槽或升迁之前，再待四年之久。

麻省理工公开课 - 媒体、教育、市场课程节选

Before crawling his way out of his mother's womb in the film's opening sequence he had to endure four contentious years making the leap from his (French) creator's drawing-board to France's cinema screens.

ECONOMIST: A honey, bare

But the real leap will come in two years' time with the introduction of third-generation mobile phones, allowing much faster Internet connections.

ECONOMIST: Government and the Internet

It requires no manual adjustment before March 1, 2100, since century years are an exception to the four-year cycle governing leap years.

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