not until的意思

It was not until 1974 that his ability to write gelled again.直到1974年，他的写作才华才又得以发挥。Not until last week was the project in full blast.工程直到上星期才全部开工.It was not until yesterday that I learned it.顶昨天我才听说这件事....

not until的音标：not until的英式发音音标为：[nɔt ən'til]not until的美式发音音标为：[nɑt ʌn'tɪl]...