ADV
（用于说明原因）主要地
Largely is used to introduce the main reason for a particular event or situation.
例句
Retail sales dipped 6/10ths of a percent last month, largely because Americans were buying fewer cars...
上月零售额下降了千分之六，主要是因为美国人买汽车少了。
The French empire had expanded largely through military conquest.
法兰西帝国的扩张主要靠军事征服。