But, the reaction says I need twice as much mag as tickle if this reaction is going to go to completion.

但是这个反应告诉我们,镁的量应该是四氯化钛的两倍,如果要反应完全的话。

麻省理工公开课 - 固态化学导论课程节选

Clearly, this isn't twice that.

很明显这儿不是两倍的量。

麻省理工公开课 - 固态化学导论课程节选