对许多潜在的种植者来说，当前的经济转变时间不合适。

The current economic shift has come at an inopportune time for many prospective growers.

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同时，加热表面上方还会出现由爆发沸腾向常规核态沸腾的过渡，通过转变时间这一特征参量能够对两种沸腾形态进行划分。

Besides, there is a changeover from explosive boiling state to conventional boiling state on the heating surface, and the transition can be denoted by changeover time.

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外拖冲击电压的极性与绝缘子表面电荷极性是否相同会影响绝缘子的电晕起始时刻、由流注向先导的转变时间间隔和流注电晕电流。

The polarity of impulse voltage and the polarity of insulator surface electric charge can affect the corona initial time of insulator, the change time - interval and the corona current.

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In our first Yeats lecture, I was talking about Yeats's early development and stylistic transformation over the course of, roughly,a twenty-, twenty-five year period.

在我们讲叶芝的第一节课，我谈到叶芝的早期发展,以及他创作风格的转变，在大约20到25年的时间里。

耶鲁公开课 - 现代诗歌课程节选