机械工程

And David said unto him, From whence come you?

大卫问他说：你从哪里来？

At last, by comparing difference of the dissociation energy of anisole and its main fragment ions of the two channels, the theoretical results further demonstrate, in the experiment, that the main dissociation channel of anisole molecular will be formed.

比较两条通道的碎片离子能量的变化，理论验证了实验中苯甲醚分子主要解离通道的合理性。