SB 15 will be delivered in 2012, and design and development work for SB 16 will begin immediately.

SB15 轰炸机将在2012年交付，SB16 的设计和开发工作也将立即开始。

youdao

SB 15 will be delivered in 2012, and design and development work for SB 16 will begin immediately.

SB15 轰炸机将在2012年交付，SB16 的设计和开发工作也将立即开始。

youdao