The United States is a republic, since its citizens elect people to represent it.
美国是共和制，因为每个公民都能选人去代表他们。


I'm lame since my accident; I need the help of my arms to walk.
事故之后我就瘸了，我需要手来帮助我走路。


Primitive men made fire by themselves since they had no electricity.
原始人不能用电，只能自己生火。


Ever since she started her diet, she has had a very slim figure.
她的身材自从节食开始就很苗条了。

We have been friends ever since.

从此以后我们一直是朋友。

※I have long since abandoned the notion that higher education is essential to  either success or happiness. Hot houses of learning do not always grow anything edible.Robert Moses, American state govenment officer——我早已抛弃了这种观念：高等教育是通往成功或者幸福的必由之路。知识的“温室”并不总能生长可供食物用的粮食。美国州政府官员  摩西  R
※The laws of Nature, that is to say the laws of God, plainly made every human being a law unto himself, we must steadfastly refuse to obey those laws, and we must as steadfastly stand by the conventions which ignore them , since the statutes furnish us peace, fairly good government and  stability, and therefore are better for us than the laws of God, which would soon  plunge us into confusion and disorder and anarchy if we should adopt them.Mark Twain, American  writer自然法即神灵法，只是用来约束每一个个体的法律，我们必须坚定地拒绝遵守。我们应该坚定地遵守忽视神灵法的规章制度，因为规章制度赋予我们和平、比较好的政府和稳定，因而对我们来说，规章制度比神灵法更好，因为如果我们采用神灵法的话，他会将我们陷入迷惑、无序和无政府状态。美国作家   马克·吐温A
※Be not angry that you cannot make others as you wish them to be, since you cannot  make yourself as you wish to be.Thomas Mann, German writer——不要由于别人不能成为你所希望的人而愤怒，因为你自己也不能成为自己所希望的人。德国作家  托马斯·曼