it is tough to do信息详情
这很难做到
it is to do───这是要做的
do it do it to───做吧做吧
to do it───去做吧
life is tough───生活是艰难的
tough───adv.强硬地，顽强地；n.(Tough)人名；(英)图赫；n.恶棍；adj.艰苦的，困难的；坚强的，不屈不挠的；坚韧的，牢固的；强壮的，结实的；vt.坚持；忍受，忍耐
tough to miss───很难错过
let is do it───让我们开始吧
it is worth while to do───值得一试
whoishow to do it───是谁干的
tough cookie is not something you want to eat. It is a person who is difficult to deal with, and would do anything necessary to get what he or she wants.───强硬的人）”并不是某种你想吃的东西，它的意思是指某个难以应付的人，他（她）会为了得到所想的东西而不折手段。
His is indeed a tough job, but somebody's got to do it.───他的工作其实相当艰苦，但是毕竟还是需要有人去做的。
it is telling anyone who will listen that consumers will suffer if tough do-not-track rules hit AD revenues, forcing web firms to charge for more content.───它也在告诉任何愿意倾听的人，倘若严格的“不跟踪”规定损及广告收入，就会迫使网络公司对更多内容收费，遭殃的可是用户。