1、困难：诲颈蹿蹿颈肠耻濒迟测；诲颈蹿蹿颈肠耻濒迟；丑补谤诲；迟谤辞耻产濒别；产耻尘辫；谤耻产。
2、例句：I now know that its not always easy to see what should be done and even harder actually to do it.现在我知道，认识到什么是应该做的并不容易，而真正去做就更加困难了。
3、Some users may be unable to see, move a mouse, or may face any number of challenges when using a computer.在使用电脑时，有些用户也许无法看见或无法移动鼠标，或者会面临很多其他困难。
