求翻译：UK to roll out space plane by 2020是什么意思？

Recently, Boeing announced that they are developing a manned spacecraft in the future, passengers can this spacecraft into low-Earth orbit. The Boeing said, the market has reached an agreement with the U.S. Space Adventures, will be developed for NASA, Boeing cst-100 manned spacecraft. Boeing said t

英国在2020年推出空间平面

展开空间飞机的英国在2020年以前

英国将推出平面空间，到 2020 年

英国在 2020 年以前展开航天飞机