Very difficult to understand什么意思

it was very difficult to build. Very difficult to understand什么意思 Drops to be very difficult是什么意思 the operation proved to be very difficult.it proved to be ___operation1 the difficult 2 a difficult选择哪一个,为什么 This question is very difficult to answer改为同义句 This question is very difficult to answer的同义句 to learn English well is very difficult.同义句 翻译I found it very difficult to win the game. Tom found （）very difficult to learn Chinese well to answer the question is very difficult改为同义句 It was very difficult to find.哪个失去爆破 To learn Geography well is very difficult的感叹句 把Some people really very difficult to imagine译成中文 He subjected us to a very difficult test.请翻译 it,very,difficult,to,is,well,learn,english,him,for Was it very difficult to buy it on the it's very difficult to understand the english hearing Eye contact is a very difficult art to learn.翻译