Ty Lawson added 22 more and Tyler Hansbrough had 18 points and 11 rebounds as the overpowering North Carolina squad cruised to the 83-69 win and an expected berth in Monday night's championship game against Michigan State.

VOA: standard.2009.04.05

Some people like to use an arrow, and the arrow points in the direction of the more electronegative end.

也可以用箭头，箭头指向,带负电的一极。

麻省理工公开课 - 固态化学导论课程节选

Some people like to use an arrow, and the arrow points in the direction of the more electronegative end.

也可以用箭头，箭头指向,带负电的一极。

麻省理工公开课 - 固态化学导论课程节选