But for those of you that have been here for 30 seconds or longer see if you can get the right answer in here.
但那些已经来了30秒以上的同学,看看你们能不能得到正确的答案。
麻省理工公开课 - 化学原理课程节选
应用推荐
模块上移
模块下移
不移动