But he says today's move marks an important step.

VOA: standard.2009.10.01

And he has left blanks here, question marks here and says it is advantageous to put them in rows and to form a table.

他左边栏是空的，还有问号，他认为,将元素以行列排成一个表格是很有好处的。

麻省理工公开课 - 固态化学导论课程节选

Light was important to the Incas,too,says Torrey, and in another of his favorite photos, inside the Temple of the Sun, he captures the moment when a beam of sunlight marks the changing season.

VOA: standard.2009.12.15