is grandmother that great writer Lu Xun was connected to his family.
他从他奶奶那儿得知他的家与大作家鲁迅有亲戚关系。
He was no longer connected with the Micrsoft.
他与微软公司再也没有关系了。
20 These chemicals，she knew，do not break down in the soil.
break down：起化学变化，分解
Muscle protein will break down more quickly when one is doing strenuous exercises.
人在剧烈活动时，肌肉的蛋白质会分解得更快
