导读: 2017年4月22日12时23分，天舟一号与天宫二号顺利完成自动交会对接。据了解，在本次任务中，天舟一号与天宫二号将一共进行三次交会对接，这在中国航天史上还是首次。
China’s Tianzhou-1 cargo spacecraft conducted its first docking with the country’s Tiangong II space laboratory on Saturday afternoon.
星期六（4月22日）下午，中国天舟一号货运飞船与天宫二号空间实验室顺利完成首次交会对接。
The rendezvous and docking process started at 10:02 am Saturday and was completed at 12:23 pm, according to the China Manned Space Agency.
据中国载人航天机构称，自动交会对接过程自周六上午10：02开始，于12：23分完成。
Next, the two spacecraft will stay for about two months in the orbit nearly 380 kilometers above the Earth. During the period, Tianzhou-1 will resupply fuel to Tiangong II and will conduct scientific experiments, the agency said.
接下来，两者将在高度约380公里的运行轨道上飞行2个月，在此期间，天舟一号将给天宫二号提供燃料补给，并进行一些科学实验，据该机构称。
After the two months, the cargo spacecraft will undock with the space lab and then carry out the second docking. Then it will undock again and start a three-month independent flight before the third docking. After the third docking, Tianzhou-1 will depart from Tiangong II and will be directed by ground control to fall back to the Earth.
两个月后，天舟一号将撤离天宫二号空间实验室，之后进行第二次对接。接着它会再次撤离进行为期三个月的独立飞行后，再进行第三次对接。完成第三次交会后，天舟一号将离开天宫二号，由地面控制指引返回地球。
Tianzhou-1, which is the country’s largest and heaviest spacecraft, was lifted atop a Long March 7 carrier rocket on Thursday night at the Wenchang Space Launch Center in Hainan province.
天舟一号是我国体积最大、重量最重的载人航天器，它搭载长征七号运载火箭于星期四晚上在海南文昌航天发射中心发射升空。
Developed by the China Academy of Space Technology, it is 10.6 meters long and has a diameter of 3.35 meters. Its maximum takeoff weight is 13.5 metric tons, enabling it to carry up to 6.5 tons of supplies.
由中国空间技术研究院研发，天舟一号身长10.6米，舱体直径3.35米，整船最大装载状态下重量达13.5吨，能够装载6.5吨物资。
The main goals of the Tianzhou-1 mission are to supply fuel to Tiangong II and to test in-orbit refueling technologies, the manned space agency said.
天舟一号任务的主要目标是向天宫二号供应燃料，并验证在轨补加技术，载人航天机构说。
In the future, the Tianzhou-series cargo spacecraft will be tasked with bringing supplies of fuel and other necessities to China’s planned manned space station, which will start construction in 2018 and is expected to enter service by about 2022.
将来，天舟系列货运飞船将负责向中国正在计划中的载人空间站运送燃料和其他必需品等。该项目将于2018年开工，预计在2022年投入使用。
