difficult的副詞形式

　　difficultly的'例句：No one knows how difficultly he struggled in the poor conditions（沒(méi)人知道他是怎樣在惡劣的環(huán)境下艱難地奮斗）；If you are having difficultly connecting to a network，click Advanced（如果您連接到網(wǎng)絡(luò)有問(wèn)題，單擊高級(jí)）。