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Three taikonauts of the Shenzhou-13 spaceflight mission delivered the first session of the Tiangong class series, China's first extraterrestrial 
lecture series, to popularize space science. The lectures, mainly aimed at young students from all over the world, began with a live broadcast from the orbiting China Space Station on Thursday afternoon.
12月9日下午，神舟十三号乘组三名航天员开授“天宫课堂”第一课，普及太空科学知识。这是中国首个太空科普系列课程，主要面向全世界的青少年学生。中国空间站进行了课程实时直播。
A total of 1,420 students from primary classrooms at the China Science and Technology Museum in Beijing, as well as other classrooms in Nanning, South China's Guangxi Zhuang Autonomous Region, Wenchuan county, Southwest China's Sichuan Province, and the Hong Kong and Macao special administrative regions, took part in video communication with the Shenzhou-13 crew, according to a statement the China Manned Space Agency (CMSA) provided to the Global Times.
据中国载人航天工程办公室向《环球时报》提供的消息，此次太空授课活动在中国科技馆设地面主课堂，在广西南宁、四川汶川、香港、澳门分设4个地面分课堂，共1420名中小学生代表参加现
场活动，与神舟十三号乘组航天员在视频中进行互动交流。
淑琼教育‖英语词句学习
taikonaut
an astronaut from the People's Republic of China 太空人
The first flight of a taikonaut was a total success.
中国太空人的首次太空飞行大获成功。
China has stepped up its space programme, with plans to put a taikonaut on the Moon by 2030.
中国加大了太空方案，并计划到2030年将人送到月球上。
deliver
If you deliver a lecture or speech, you give it in public. 发表
The president will deliver a speech about 
schools.
校长将发表关于学校的演讲。
session
A session of a particular activity is a period of that activity. 一场 (活动)
The two leaders emerged for a photo session.
两位领导人出场参加了合影。
extraterrestrial
Extraterrestrial means happening, existing, or coming from somewhere beyond the planet Earth. 地球外的
popularize
to make something well known and liked 使受欢迎；宣传，推广
to make a difficult subject or idea able to be easily understood by ordinary people 
who have no special knowledge about it 使通俗化，使大众化，使易懂，使普及
Skinner was the psychologist who popularized behavior modification.斯金纳就是那位使行为矫正概念得到普及的心理学家。
orbit
If something such as a satellite orbits a planet, moon, or sun, it moves around it in a continuous, curving path. 环绕…的轨道运行
