短语讲解：
1. The assembly will fly for some 12 days before they separate and prepare for a second docking.
prepare for (使)为…作准备
例句：Right now they are preparing themselves for the Olympic Games.
眼下他们正在为参加奥运会作准备。
2. We will use it in the construction of a space station where we will carry out science and technology experiments when completed.
carry out实行，执行，贯彻，进行(到底)；开展
例句：Three students were chosen to carry out the experiment.
挑选了三名学生进行这项实验。
3. China is planning to launch Shenzhou 9 and Shenzhou 10 spacecraft next year, both of which will dock with the Tiangong-1 prototype space lab.
plan to计划, 打算
例句：What do you plan to do during the holidays?
你打算在假期里做什么?
4. At least one of the two missions will be manned.
at least至少
例句：He smoked at least half a packet of cigarettes a day.
他每天至少抽半包烟。
