developing tank

例句：

1. 1. The developing tankis a symbol of national defense.
   发展中的坦克是国家防御的象征。
2. 2. The tank in development isexpected to be ready for testing by theend of the year.
   正在开发的坦克预计将在年底前准备好进行测试。
3. 3. The tank's development has beenhindered by the lack offunding.
   坦克的发展受到了资金不足的阻碍。