three-legged 的legged

为何是three-legged desk而不是three-leg desk
可有；连字符啊

英语完形填空
Every day,I would see a one-legged man.He went through ash cans for cigarette butts and trash cans outside of restaurants(1) food.It was only amonth before (2),starting to get cold and I could not (3)thinking about him .It was a year when we did not have enough (4) to really have much in the way of presents,but I figured what was too (5) for us would be a lot for someone who had (6).So I bought a toothbrush ,toothpaste,a pack of cigarettes,cans of tuna ,just little things that did not (7) much and then I added a blanket and sweatshirts.I made a (8) up like a present and went in search of this man .I saw him hobble outside McDonald's.I (9) him ,saying ,"I'd like to give you a Christmas present.There are some food (10) in here and some things you might be able to (11) ."He sidestepped ane said ," (12),thank you.I just had lunch.I don't (13) anything."Then he hobbled on down the sidewalk ,(14) me standing there in tears.I took the box down to a little shop that gavethings out to the poor and (15) and told them what had happened and asked that they would (16) the box to someone who could use it .The person there told me not to be (17) and let my feelings be hurt as I was still(18).I told her it was not me but for him because what I had done (19) his dignity by treating him like a person in need.I was so (20) .What a great lesson for me to learn!1.A .sorting out B.watching over C.dealing with D.looking for2.A.New Year B.Christmas C.autumn D.winter3.A.quit B.enjoy C.choose D.remind 4.A.chance B.energy C.money D.interest5.A.necessary B.valuable C.much D.little 6.A.anything B.nothing C.something D.everything7.A.cost B.hold C.include D.cover 8.A.cigarette B.toothbrush C.blanket D.box9.A.came up with B.went up to C.spotted out D.pointed at10.A.bags B.packages C.items D.lists 11.A.trade B.use C.donate D.save12.A.No B.Yes C.Pardon D.Good 13.A.have B.respect C.need D.spare14.A.suggesting B.imagining C.keeping D.leaving 15.A.homeless B.hopeless C.careless D.fearless 16.A.sell B.give C.open D.show17A.formal B.serious C.sad D.grateful 18.A.begging B.aruguing C.serving D.crying19A.paid off B.found out C.made up D.found out 20.A.ashamed B.worried C.pleased D.disappointed

英语翻译
1） three-legged stacked core transformer,15-kVA,wye-delta
dry-type transformer,208Y/120:240;
2）five-legged stacked core transformer,150-kVA,grounded
wye-wye oil-filled transformer,12470GRY/7200:208Y/120.
最后面的208Y/120:240和12470GRY/7200:208Y/120.

英语翻译
Not everyone has this two-legged instrument,but everyone,with a little attention,may observe signs of that kind of fault-finding disposition and make the same resolution to avoid those infected with it.我实在是看不懂后半句话.

poultry should stand in higher estimation than four-legged animals
because the air is less dense than the earth

The elephant is the biggest Four legged animals i
The elephant is the biggest Four legged animals in the world是什么意思