一年到头的  Perennial; perpetual

永久的不断的一年到头的  perpetual

3.7一二甲基一辛烯一一一醇一一  rhodinol

一年一次  Annual

一年一次的  Annual; Yearly

一年一代  univoltine

一年一度的体  annual colony

1.2一苯并异噻唑啉一3一酮  1; 2—Benzisothiazoline—3—one

3.7二甲基一辛二烯一〔1.6〕一醇一〔3.〕  l-linalool

百年一遇  frequency of 1

百年一遇暴风雨  hundred-year storm

百年一遇的海浪  one hundred year wave

半年一次的  biannual

毕业后第一年住院医师  general medical training; first postgraduate year residents

采样一一保持  sample-hold

撑离码头一定距离靠泊  breast off

持续一年  Yearlong

春一年蓬  Erigeron philadelphicus

达到一定的转速  turnup