| 释义 |
cover a year
基本例句
达一年; 历时一年
It then took up to 7 a year for the piglet cells to mature and start producing full quantities of insulin.这些小猪细胞此后需要多达一年的时间发育成熟，并开始产生足量的胰岛素。
The construction of this canal took one year.这条运河历时一年才修建成功。
This company spent a year developing this card punching system buses.这家公司历时一年才开发出这套公共车刷卡系统。 |