早上起床的时候,你打着呵欠关掉闹钟,然后一边听着早间新闻一边开始洗漱,这是在地球上的人们在清晨通常做的事情。然而,如果你是一名生活在太空中的航天员,早晨你所做的第一件事情可能却是一项医学实验:卷起一小块干净的药用棉花,放在嘴里含一会, When you get up in the morning, you yawn to turn off the alarm and start to wash while listening to the morning news. This is what people on earth usually do in the early morning. However, if you are an astronaut living in space, the first thing you did in the morning might be a medical experiment: roll up a small piece of clean medicinal cotton and put it in your mouth for a while ,